Department of ArchitectureProfessor/Assistant Dean

Last Updated :2024/06/18

■Researcher basic information

Research Keyword

  • 高齢者入居施設   高齢者向け住宅   サービス圏域   要介護高齢者   ケアハウス   行動観察調査   地域密着型サービス   小規模多機能型居宅介護   

Research Field

  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Architectural and city planning



  • 2017 - Today  Kindai UniversityFaculty of Architecture教授
  • 2011  Kindai UniversityFaculty of Architecture准教授

Educational Background

  • 2002/04 - 2005/09  京都大学大学院  工学研究科  環境地球工学専攻
  • 2000/04 - 2002/03  Kyoto University  工学研究科  環境地球工学専攻
  •        - 2000/03  Hiroshima University  Faculty of Engineering  Cluster 4 (Social and Environmental Engineering)

■Research activity information


  • 2022/03 一般財団法人 住総研 住総研 研究・実践選奨 奨励賞
    受賞者: 山口健太郎、中嶋友美、三浦研、園田眞理子
  • 2015/11 大阪ガス NEXT21アイデアコンペティション 優秀賞
    受賞者: 山口健太郎,中嶋友美
  • 2015/01 奈良県 奈良県総合医療センター周辺県有地活用アイデアコンペ 第1部門優秀賞
    受賞者: 山口健太郎,山田憲史,中嶋友美,松井彩華,三好諒,森田純平
  • 2010/08 日本建築学会奨励賞 2010年


  • KORI Chinatsu; YAMAGUCHI Kentaro; NAKASHIMA Tomomi
    AIJ Journal of Technology and Design Architectural Institute of Japan 29 (72) 940 - 945 1341-9463 2023/06 
    The purpose of this study is to clarify the actual situation of family visits and participation in the end-of-life care of Home-hospices due to the current situation with COVID-19. 1. Standard precautions were thorough a high percentage of home-hospices. 89.2% opened the window more than once an hour for ventilation measures. 2. 78.4% said they would "secure the last time for the person and the family no matter how the infection is prevalent". There was no Home-hospices who chose "When the infection is prevalent even a little, family participations in the end-of-life care are not allowed".
  • KORI Chinatsu; YAMAGUCHI Kentaro; NAKASHIMA Tomomi; MIURA Ken
    Journal of Architecture and Planning (Transactions of AIJ) Architectural Institute of Japan 88 (805) 855 - 866 1340-4210 2023/03 
    The purpose of this study is to: 1)Clarify the measures to prevent and control COVID-19 infections in a home-hospice. 2)Reveal families’ mourning behavior and the support they received during the period of end-of-life care, as observed by the manager. Some results show as follows: 1)The home-hospice was taking measures to prevent and control the spread of COVID-19 while trying to continue daily life as usual for its residents and their families. 2)We clarified that the families’ mourning during the period of end-of-life care had six stages from the interview of managers.
  • 山口健太郎; 園田眞理子; 三浦研; 中嶋友美
    住総研研究論文集・実践研究報告集 (48) 2433-801X 2022 [Refereed]
  • 石井敏; 山口健太郎; 三浦研; 林瑞紀; 田中翔太
    東北工業大学地域連携センター・研究支援センター紀要 東北工業大学地域連携センター・研究支援センター 33 (1) 55 - 59 0915-2024 2021/02
    Journal of Architecture and Planning (Transactions of AIJ) Architectural Institute of Japan 86 (780) 391 - 401 1340-4210 2021 [Refereed]


     "Unit care", in which a small number of residents live together, has been one of the effective methods to the practice of individual care in elderly facilities. The unit care type facilities were adopted not only in the nursing home but also in other elderly facilities and welfare facilities. However, the unit type is said to have the following problems. The first is that the staff spends a lot of time alone assisting in the unit, and the second is that it is difficult to educate staff.

     So, in this survey, from the viewpoint of planning of scale in care group, we are considered improvement of working environment of staff.


     The purpose of this study is to clarify the effects of the differences in the scale of nursing care units on the work system and nursing care contents. The subjects of the survey were: 7-8 person unit, 10-person units (2 facilities A, B), 12-person unit and 13-person unit.

    Research Method

     The survey methods were interview survey, behavior observation survey and activity amount survey of staffs. The period of behavior observation survey was 24 hours × 3 days, and the target unit were 2 units of each facility.


     (1) Shift of care staffs during the daytime: The 7-8 person unit and 10-person unit B had a two-person system for early and late shift. The 10-person unit A had a three-person system for early, day, and late shift. The 12-person unit and the 13-person unit had a four-person system for early, day shift, and two late shift staffs.

     (2) Percentage of the number of staffs stayed in the unit: In the 7-8 person unit, the ratio of no staff in the unit was 8.4% (75.6 minutes). On the other hand, in the 12-person unit, the ratio of two or more staffs in the Unit was 64.2% and that in the 13-person unit was 73.3%.

     (3) Percentage of time when there was no staff in LDK: 7-8 person unit is 51% (464.6 minutes), 10-person unit A was 37% (333 minutes) and 10-person unit B was 36% (324 minutes). 12-person unit 37% (333 minutes) and 13-person unit was 28% (243 minutes). The difference between the 7-8 person unit and the 13-person unit was as large as 23%.

     (4) Characteristics of individual assistance: Regarding bathing assistance, the 13-person unit also provided assistance at night, but the 10-person unit A and the 10-person unit B provided assistance in the morning.

     As for dietary assistance, breakfast was provided at all facilities in accordance with the life rhythm of individual residents. For lunch and dinner, the 7-8 person unit, 10 person unit A, 10 person unit B and 12 person unit had a uniform meal time, but the 13 person unit had a long meal time and individual care was possible.

     Regarding excretion assistance, in the 12-person unit and the 13-person unit, the difference between the regular excretion assistance time and that in other time zones was small, and excretion assistance was frequently provided.

     (5) Information transmission such as records and business conversation: In the 7-8 person unit, there were few conversations during work, and information was communicated by meeting and recording. In the 12-person unit, in addition to records, there were long meeting time and business conversations during work, and information was shared among staffs.

  • YAMAGUCHI Kentaro
    AIJ Journal of Technology and Design Architectural Institute of Japan (64) 1066 - 1071 1341-9463 2020/10 [Refereed]

    The purpose of this study is to clarify the motion space when the caregiver transfer a resident "from the wheelchair to the bed" and "from the bed to the toilet" using a floor lift.
    1. The motion space when caregivers transfer residents from the wheelchair and the bed were 1605mm on the head side, 2005mm on the leg side from the center of the bed, and 2687mm on the bed side from the wall.
    2. The width of the frontage of the toilet required for transfer assistance to the toilet were over 1600 mm.

    Journal of Architecture and Planning (Transactions of AIJ) Architectural Institute of Japan (768) 253 - 263 1340-4210 2020/02 [Refereed]


     In Japan, which is becoming a high-mortality society in addition to a super-aging society, the establishment of a suitable residence for older people to spend their last days is an urgent concern. In a home type hospice, which is a residence wherein home care services are provided and covered under nursing insurance, 5-6 individuals live together. Although home type hospices are expected to play an important role in the future as one of the residential options for patients to spend the terminal stage of their life, no study has assessed the actual living conditions and physical characteristics of home type hospices.

    Reserch Objectives

     By understanding the actual environment, such as resident attributes and nursing care provision system, this study aimed to clarify the characteristics of home hospices, which primarily utilize existing residences.

    Research Methods

     The target residences were 28 business establishments and 37 buildings in Japan, which were certified by the Japan Home Hospice Association. Surveys were conducted through interviews with the administrator of each business establishment.


     1. There are age limitations for moving elderly people to facilities and residences providing home care services. However, home type hospices accept residents regardless of their age. While the majority of the residents are aged >80 years, there are some residents aged <60 years. 2. If we assess the reason and duration of occupancy of such facilities on the basis of disease type, cancer-centric home type hospices mostly accept patients in need of medical care, and most residents remain in the facility for a short duration, usually <1 year. These facilities provide hospice care for patients in the terminal stage of their life. Dementia-centric home hospices support patients with severe dementia. It is believed that these houses complement the insufficiency of facilities in different regions and the variety in the levels of care that is provided. Complex home hospices mostly accept patients in need of medical care and who could not live at their own residence. Thus, home hospices may accept residents regardless of the patient's age and disease type, including older people and those with malignant diseases, respectively. In addition, these facilities function as a safety net for patients with severe conditions, who are difficult to deal with in the existing system . 3. Apart from home type hospices, there were 25 business establishments that were serving as home-visit nursing agencies, accounting for approximately 90% of the surveyed facilities. Cooperation between resident staff, which is responsible for providing daily living support, and home-visit nursing agencies is necessary to provide continuous support before moving patients. Therefore, in many cases, home-visit nursing was provided in the business establishments. 4. Renovation of buildings could be classified into four types, namely "improvement in building performance, " "improvement in accessibility, " "space expansion, " and "barrier-free design." Increase in the number of bathrooms/washrooms and toilets as well as renovation to accommodate wheelchairs were the most common. To utilize existing buildings as home type hospices, emphasis should be particularly given to the barrier-free design of plumbing fixtures. 5. Introduction through acquaintances was the most common method of property selection. It tended to reflect a higher level of connection and recognition with the local residents. This must be because of the owner's connection with the region, which is shared with the new property owner.

  • YAMAGUCHI Kentaro
    AIJ Journal of Technology and Design Architectural Institute of Japan 26 (62) 227 - 232 1341-9463 2020 [Refereed]

    The purpose of this study is to clarify the motion space necessary for assistance around the bed, such as excretion assistance, bed bath assistance, position change, sheet exchange, and transfer assistance from a wheelchair to bed.
    1.In the cases other than transfer assistance: The motion space required when the bed is placed parallel to the wall is 3200mm × 1883mm, and when placed vertically, it is 2578 mm × 2924 mm.
    2.For transfer assistance: The motion space required for transfer assistance is 3054 mm × 2361 mm.

  • 山口健太郎
    日本建築学会技術報告集 25 (60) 833‐838(J‐STAGE)  1341-9463 2019 [Refereed]
  • 宮崎崇文; 中嶋友美; 山口健太郎; 石井敏; 佐藤哲; 浜崎裕子
    日本建築学会計画系論文集 Architectural Institute of Japan 83 (751) 1645‐1655(J‐STAGE) - 1655 1340-4210 2018 [Refereed]
     This study aims to quantify the structural damages, evacuation situation, and utility interruptions caused to facilities for the elderly in the 2016 Kumamoto earthquake. We gathered data by administering a questionnaire to all facilities for the elderly in Kumamoto and Oita prefectures, and a series of interviews administered at 17 facilities in the Kumamoto prefecture. The results are as follows:
     1) The foreshock caused structural damages in 56.2% and 16.1% of facilities in the Kumamoto and Oita prefectures, respectively. Further, the main earthquake caused structural damages in 69.2% and 21.4% facilities in the Kumamoto and Oita prefectures, respectively. The interior and exterior walls and ceilings were found to be cracked, and some furniture were damaged, while the interior of one of the facilities was severely damaged by flooding because of a sprinkler malfunction. After the foreshock, in most facilities, the furniture was damaged because it was not fixed to the walls. To ensure less damage after the foreshock, most facilities took precautions such as putting tall furniture on the floor and moving the residents' beds to a safe space.
     2) According to the interview survey, most of three facilities to which evacuees temporarily fled from outside the facilities, and they returned to the facilities in the following morning after staying a night in vehicles. Evacuation to other facilities was made at only two facilities of GH. At four facilities, most of which were nursing homes, residents gathered in a space. At unit-type nursing homes, residents gathered in a dining room and a hallway within a unit, and at old type nursing homes, residents gathered in a functional recovery training room and an elevator hall. The number of residents per room changed at only one unit type nursing home.
     3) According to the questionnaire survey, electricity was lost in 21.4% of the facilities, water supply was lost in 25.3% of the facilities, gas outage was observed in 55.6% of the facilities, with 12.1% of propane gas outage, and 6.3% of facilities suffered from sewage drainage stops. According to the interview survey, no facilities experienced a serious shortage of food because relief supplies became available and procurement became possible after a few days of subsistence with their food stock.
     4) About a quarter of the facilities (29.5%) accepted evacuees who needed care, and 17.6% accepted general evacuees by the questionnaire survey. The interview survey found that there were many cases where local residents evacuated their homes because they felt uneasy about the aftershocks following the foreshock, and no facilities clearly differentiated required assistances from general evacuees when they accepted evacuees, and the facilities used their community regional common space, entrance hall, and annexed day service floor as an evacuation space.
  • 山田雅之; 山口健太郎; 高田光雄
    日本建築学会計画系論文集 83 (751) 1623‐1633(J‐STAGE)  1340-4210 2018 [Refereed]
  • 山口 健太郎; 井上 由起子; 本間 里見; 陳 晨
    日本建築学会計画系論文集 日本建築学会 (723) 1089 - 1089 2016/05 [Refereed]
  • YAMAGUCHI Kentaro; INOUE Yukiko; HOMMA Riken; CHEN Chen
    Journal of Architecture and Planning (Transactions of AIJ) 日本建築学会 81 (723) 1099 - 1099 1881-8161 2016/05 [Refereed]
    1. Introduction In the field of care insurance, Continue Living is required in regions that have long existed on an ideal of a community-based integrated care system. To support Continue Living for the elderly, we need a system that not only provides medicine and care but also prevention, health, life support and that can use systems integrally and appropriately in areas of daily living. Out of these, (1) cooperation in provision of medicine and care and (2) prevention, health, life support, and various preparations of counseling services are important problems of the future. Especially, the latter services concerning prevention and health, and life support, are required to develop in each region. However, this service has been established in the insurance system. Omuta city started the Community Center Project in 2006, and this project has worked on the prevention of a long-term care state and health class in the core of community centers. It is located throughout the city: the number of community centers was 36 and 40 facilities in 2010 and 2014, respectively. This study aims to clarify the time series change of facility management and the factors that activate it. The investigation period was between 2010 and 2014, five and nine years since the project started. 2. Research Method The objects of this study were all the community centers opened in Omuta city as of April 2014. The methods used included a questionnaire, interview, and location survey. The questionnaire comprised facility management and actual performance for each facility. The recovery rate of the questionnaires was 100% in 2010 and 92.5% (actual performance rate was 87.5%) in 2014. Interviews were conducted on 10 facilities. The locational survey rate was 40/40 and the analyses of floor plans were 39/40. 3. Discussion 1) The facility of "Opening at amount of time hours" in 2010 and 2014 was more than 80%. The facility operated from six to nine hours. The percentage for opening hours was about 60%. 2) A steering group in action decreased proprietary activities by corporations and increased group activities by citizens. 3) In 2014, the average monthly number of openings per facility was 20 counts; the average monthly number of participants per facility was 163 people. A comparison of 2010 and 2014 show a significant difference of 1% for both indexes. 4) In the case study, community centers served the function of providing consultation services from social welfare workers and residents, finding problems, and noticing changes of local residents. It also acted as an intermediary to specialized agencies and coordinated with various organizations. 5) Factors influencing the revitalization of community centers from statistical investigation were as follows: (a) Having staff on duty at all times in the community center, and always being open in the daytime; (b) Conducting original activities for children and commissioned projects from local governments; (c) Advertising facilities in the area to create public relations papers; (d) Developing a relationship between human resources, such as regarding volunteer; and (e) Participating in neighborhood community associations and community activities.
    Journal of Architecture and Planning (Transactions of AIJ) 日本建築学会 81 (720) 279 - 279 1881-8161 2016/02 [Refereed]
    This study performed analyses of floor plans using 490 floor plans of Elderly Housing with Supportive Services (hereinafter, Sakojyu), obtained by a complete enumeration survey on all Sakojyu as of Dec. 31st, 2012 to see the current physical settings. The key results are as follows: 1) The area of dwelling units were focused on 18.0‐19.0 m2 adopting the relaxed criterion. The unit plans of 18‐19 m2 were focused in 1R type, and facilities set were limitied, 2) Comparison between areas of dwelling unit and common space led four groups: small unit & small common, small unit & large common, large unit only, and large unit & common. The small unit & small common group occupied 27.8% of the the 490 Sakyojyu , and had machinery baths in 21.0% of the group, kitchens were set in less than 70%. The results shows some of current Sakojyu is similar to the spatial composition of nursing homes based on lump treatment before the introduction of Unit Care.
  • 小西 翔太; 山口 健太郎; 三浦 研
    都市住宅学 = Urban housing sciences 都市住宅学会 (91) 139 - 144 1341-8157 2015/01 [Refereed]
  • YAMADA Masayuki; YAMAGUCHI Kentaro; TAKADA Mitsuo
    J. Archit. Plann. Architectural Institute of Japan 80 (709) 475 - 483 1881-8161 2015 [Refereed]
    The purpose of this study was to clarify the quantity of personal belongings that soon-to-be residents of serviced housing for the elderly wished to bring with them. The following points were clarified. (1) On average, they wished to bring 1.8 platters, 3.9 small plates, 1.5 bowls, 3.6 small bowls and 3.2 rice bowls. Concerning cookware, they expressed a desire to bring one of every type of item that they owned. In the case of electrical appliances used for cooking, they wished to bring all the items that they possessed to the new dwelling. (2) They expressed a preference for a table for two people, together with chairs, for situations when they received visitors. (3) They wished to bring the bed that they currently possessed. They did not intend to bring a sofa, but instead a low table and a "kotatsu" with cushions. (4) For each type of clothing item, they intended to reduce the number sharply when moving into their new dwelling. Instead of bringing a large chest of drawers, they wished to bring an average of 2.7 storage cases. (5) They intended to choose a small number from the many books, photograph albums and accessories that were in their existing dwelling.
  • OKUDA Kinya; YAMAGUCHI Kentaro
    J. Archit. Plann. Architectural Institute of Japan 79 (705) 2375 - 2385 1881-8161 2014 [Refereed]
    The aims of this study are to clarify the actual condition of a complex of different businesses such as a spa facility, restaurants and shops as well as welfare service and to investigate the effect of the complex on social interactions. We tracked the behavor of users and staffs and, interviewed the service manager of the complex. It is shown that the S-facility is used by not only customers of welfare service but also various other users. Both direct and indirect social interactions are seen. The S-facility satisfies the requirements for an attractive place where many people gather.
  • Kentaro Yamaguchi; Toshikazu Dejima; Chika Shioyama
    AIJ Journal of Technology and Design Architectural Institute of Japan 20 (45) 647 - 652 1881-8188 2014 [Refereed]
    The aim of this paper is to extract of the life style of the senior housing with services using workshops by care staffs in the planning process. The methods are the following three types. It were three-choice multiple questions and KJ method, brainstorming technique. In any method, care staffs discussed from resident's point of view in workshops. As a result, it were extracted the following: 1) Resident's the age and household composition, long-term care need, life style based on local circumstances. 2) Life and care support to stay living in senior housing with services.
  • Kentaro Yamaguchi; Toshikazu Dejima; Chika Shioyama
    AIJ Journal of Technology and Design Architectural Institute of Japan 20 (45) 671 - 676 1881-8188 2014 [Refereed]
    This paper the reports results of workshop with full scale furniture models in the design process of the senior housing with services. Participants in the workshop were care staffs of residential facilities for the elderly. As a result, it were extracted the following: 1) This workshop considers various life styles and functions of the dwelling unit. 2) It is able to check the connection of the room, such as the presence or absence of partition wall. 3) It is able to consider the size of domestic sanitary spaces when the resident needs the care.
  • YAMADA Masayuki; YAMAGUCHI Kentaro; TAKADA Mitsuo
    J. Archit. Plann. Architectural Institute of Japan 79 (695) 11 - 20 1340-4210 2014 [Refereed]
    This paper aimed to clarify the process of moving into rental housing for the elderly and the effect of living environment after relocation. To make clear these point, the interviews was repeated several times, from 2008 to 2009, in two rental housing for the elderly.<br>Consequently it was shown that<br>1. Many of the motivation for moving was a vague sense of unease felt in old age. And changes in circumstances to feel anxiety were diverse and complex.<br>2. Many elderly people moved to the housing without obtaining the property information by themselves.<br>3. The degree of involvement of the elderly for moving was divided into three from the relationship with children.<br>4. Circumstances leading to the housing was divided into eight types from the relation between psychological transition and active involvement of the elderly on the move.<br>5. The elderly who have moved aggressively were easy to maintain the living environment of the past. On the other hand, the elderly who have moved negatively did not get used to the new living environment.
  • YAMAGUCHI Kentaro; ISHII Satoshi; INOUE Yukiko; MIURA Ken
    J. Archit. Plann. Architectural Institute of Japan 78 (690) 1733 - 1742 1881-8161 2013 [Refereed]
    The aim of this study is to clarify the damages and the Business Continuity caused by The Great East Japan Earthquake about facilities for the elderly through visiting and interview survey. The results are as follows; 1) Residents in community-based facilities evacuated from tsunami were using cars. Those in large-scale facilities evacuated to the upper floors using the staircases being carried by care staff. 2) Residents in facilities, their rooms' windows or sprinklers were broken caused by the earthquake, were forced to evacuate to another floors or buildings. 3) Even in the facilities with no or less damaged, the care system had to be changed and the residents were forced to move to another room in the same facilities for a certain period of time. This was caused for providing accommodation for refugees in the area, lifeline cutoff and staff shortages.
  • YAMADA Masayuki; OKIMURA Takuya; YAMAGUCHI Kentaro; TAKADA Mitsuo
    J. Archit. Plann. Architectural Institute of Japan 77 (677) 1545 - 1552 1340-4210 2012 [Refereed]
    In this case study, we aimed to revealed the reality of life support services quantitatively in the rental housing for the elderly. Conclusions were as follows :<br>1. Agency, description of how to use appliance, consultation was required in order of life support services.<br>2. The elderly requiring care needed about 1.7 times as many services as the self-supported elderly.<br>3. In view of the time series of the day, emergency response was required regardless of buisiness hours. Therefore, it is important to place the resident staff. And, in view of time series of months of residence, it had been confirmed that is cost nearly 5 months in response to the service demand from them.<br>4. According to the questionnaire survey, in service in the residence, many elderly wanted the service with a dangerous behavior such as changing light bulbs. And, in the service outside the housing, they wanted the service to help out, such as courtesy van.
  • 所 道彦; 佐藤 由美; 山口 健太郎; 米野 史健; 田端 和彦; 三浦 研
    都市住宅学 公益社団法人 都市住宅学会 2011 (72) 79 - 85 1341-8157 2011 [Refereed]
  • YAMAGUCHI Kentaro; ISHII Satoshi; MIURA Ken
    J. Archit. Plann. Architectural Institute of Japan 75 (656) 2307 - 2314 1340-4210 2010 [Refereed]
    The aim of this study is to clarify the architectural features of community base small multi care facilities from layout plan view analysis. Investigation performed the questionnaire including the request of the institution plan view for 908 facilities. The collection rate was 27.4 percent. The results are following.<br>(1) The rate of "all private rooms" was 39.8 %.<br>(2) As for living and dining area, 3 to 4 sq m per person occupied many.<br>(3) The width of a corridor, area of bathrooms or lavatories in the practical use of existing house were narrower than an ideal value.
  • YAMAGUCHI Kentaro; INOUE Yukiko
    J. Archit. Plann. Architectural Institute of Japan 75 (649) 559 - 568 1340-4210 2010 [Refereed]
    This study aims to clarify the actual condition of facility management and the residents' life in satellite nursing home. The method of this study is questionnaire and interviews of staff and residents' family.The results are as follows:<br>1) The number of units is decided by the system of care staffs during night. As a result, many satellite nursing homes adopt 2 units and a 24-hours' home service.<br>2) Most of the residents moved into the satellite nursing home from the range of 5km.<br>3) Family can easily visit the satellite nursing home often and stay a longer time in it. They can relax carrying chairs and sofas in the resident's room.
  • ISHII Satoshi; MIURA Ken; YAMAGUCHI Kentaro
    Journal of architecture and planning 一般社団法人日本建築学会 74 (635) 17 - 24 1340-4210 2009/01 [Refereed]
    The aims of this paper is acquiring planned knowledge through present and actual condition grasp of "community base small multi care facilities" which is a place to support the aged people requiring care of being home that was newly appeared by the public-nursing-care-insurance revision in April, 2006. Investigation is based on the actual condition grasp investigation by the questionnaire in a nationwide scale. The management of institutions and the actual condition of a construction outline which have been just institutionalized became clear. Since there are many examples using especially the existing building, it is necessary to grasp from now on in nearby details, such as the method of practical use of the existing building, and a subject in that case. Moreover, since the state of the space composition of "visiting" and "night staying" portion, the kind of compound function, etc. are also the points which lead to the state of the plan of the facilities directly, analysis is advanced and pursuit of a planned subject and pursuit of planned knowledge are needed.
  • Yurika YOKOYAMA; Toshie KOGA; Ken MIURA; Kentaro YAMAGUCHI
    MERA Journal Man-Environment Research Association 11 (22) 1 - 10 1341-500X 2008/08 [Refereed]
    In this paper, the authors argue environmental differences between the 2 kinds of residential facilities for the elderly people with dementia, i.e. Nursing Home (NH) & Group Home (GH), by examining residents' behavioral errors occured within either of the two environments. The cases of the residents' behavioral errors were collected by means of focus interviews to the trained care staff of each facility, and classified into 8 categories. The result suggests that these categories are further summarized into 3 patterns: the first, represented by category 2 - behavioral errors in searching for his/her way -, is the ones which are observed more in NH than in GH. And the second, represented by category 1 & 6 - errors in going in and out appropriately of the building or a room, and errors in doing suitable work in an appropriate place, respectively -, is the ones vice versa. The third, represented by category 3 & 5 - urinary or excretory errors and others with sanitary trouble, and errors with the confusion of possession or on dealing with the ordinary things, respectively -, is the ones which are observed frequently at certain facilities but not of the same kinds. Detail examination of the cases further suggests that environmental differences between the 2 kinds of facilities might bring these differences in numerical distribution of the patterns.
  • YAMAGUCHI Kentaro; MIURA Ken
    Japanese journal of physiological anthropology 日本生理人類学会 12 (2) 75 - 82 1342-3215 2007/05 [Refereed]
    This paper organized research plan and survey methods on the current living conditions of the elderly in the residential facility. Then a study checks the validity of a survey that understands the change in the life of the severely frail elderly. The methods utilized were a behavioral tracking survey, a questionnaire survey and observation by actigram. The results are as follows: Sleep-wake rhythm is formed regularly by dispersing the time of ambulation for the certain duration in a day.
  • 山口 健太郎; 三浦 研; 高田 光雄; 山田 雅之; 山中 直; 富田 啓介
    人間・環境学会誌 人間・環境学会 10 (2) 61  1341-500X 2007/05
  • YAMAGUCHI Kentaro; SAITO Yoshinori; MIURA Ken; TAKADA Mituo
    Journal of architecture and planning 一般社団法人日本建築学会 71 (608) 27 - 34 1340-4210 2006/10 [Refereed]
    This study clarified relation of posture, behavioral patterns and sleep-wake rhythm of nursing home residents with deteriorated ADL. The methods utilized were a behavioral tracking survey, a questionnaire survey and observation by actigram.The results are as follows: 1) Changes of posture from lying, to sitting on a floor, and to sitting on a chair increased the ratio of awakening state accordingly. 2) When time of ambulation became below "about 150-210 minutes", Physical activity during day and night were reversed or Physical activity during night increased. 3) Sleep-wake rhythm is formed regularly by dispersing the time of ambulation for a certain duration in a day.
  • YAMANAKA Sunao; YAMAGUCHI Kentaro; MIURA Ken; TAKADA Mitsuo; SAITOH Yoshinori
    Journal of architecture and planning 一般社団法人日本建築学会 71 (599) 49 - 56 1340-4210 2006/01 [Refereed]
    This study aims to clarify the effect of the introduction of the bathing corresponding to the individual care for the elderly. The results are as follows; 1) After reparing the bathrooms and dressinng rooms, the circulation was dispersed and the number of the elderlies in the same rooms reduced. On the other hand, the elderly's waiting time became long and the care worker's care patterns didn't improve. 2) Afterward by introducing the individual bathing care system, waiting time became short and the care appropriate to the eldely's situations was brought into practice.
  • YAMAGUCHI Kentaro; SAITO Yoshinori; MIURA Ken; TAKADA Mituo
    Journal of architecture and planning 一般社団法人日本建築学会 70 (595) 49 - 56 1340-4210 2005/09 [Refereed]
    This study clarified the effects generated by introduction of the innovated modular wheelchair on the activities and the behavioral patterns of the nursing home residents with deteriorated ADL. The methods utilized were a behavioral tracking survey, a questionnaire survey and observation by actigraph. The results were as follows: 1) Time of ambulation of the bedridden residents was promoted. 2) By increased time of ambulation time, the residents showed mode of counts of activities and increased number of activity counts. 3) Behavioral patterns of the residents also changed from "no ambulation per day type"to"one-time ambulation per day type".
  • YAMAGUCHI Kentaro; YAMADA Masayuki; MIURA Ken; TAKADA Mituo
    Journal of architecture and planning 一般社団法人日本建築学会 70 (587) 33 - 40 1881-8161 2005/01 [Refereed]
    This study clarifies the effects of downsizing of care units on individual care. To make it clear, the behavioral tracking surveys for staff and residents were carried out at an existing nursing home. The results are as follows: 1) The staff members go to other units less frequently, and stay longer at their own units. 2) The amount of physical care given to residents maintains, and that of communication increases. Staff members give care residents twice as long as before. 3) Staff members shared information at a meeting room where all of them attended, but now they do by communicating each other within their own units.
  • YAMAGUCHI Kentaro; SAITO Yoshinori; YAMADA Masayuki; MIURA Ken; TAKADA Mitsuo
    Journal of architecture and planning 一般社団法人日本建築学会 第582号 (582) 33 - 40 1340-4210 2004/08 [Refereed]
    The purpose of this study is to clarify the circumstances in which the residents' postures are changed in a nursing home. The residents' behavior tracking survey and the interviews with the staff were performed for this study. The results are as follows. 1)As the body functional capacity declines, the ratio of staying in a common space decreases. Some with akathisia or with dysphagia were observed bedridden for the whole day. 2)As the body functional capacity declines, the variation and the number of the residents' postures decreases. 3)Among the postures observed of those who are unable to transfer or with akathisia and dysphagia. "sitting on a wheelchair" holds 100% of the data in the common spaces. And some were observed staying seated for quite a long time in one day
  • OTSUKA Takao; SAITO Yoshinori; YAMAGUCHI Kentaro; KINUKAWA Mari; MIURA Ken
    Journal of architecture,planning and environmental engineering 一般社団法人日本建築学会 69 (576) 9 - 16 1340-4210 2004/02 [Refereed]
    The purpose of this study is to suggest environment for the wheelchair users in a nursing home. This study focuses on behavioral patterns of elderlies from viewpoints of moving ability, transfer ability and degree of dementia, and on care of staffs. The results are as follows. (1)For the elderlies who cannot transfer by themselves, it is necessary to improve care environment and develop the tools that support transfer ability. (2)For the elderly with severe dementia, it is necessary to make a living base smaller size.
  • YAMAGUCHI Kentaro; MIURA Ken
    Japanese journal of physiological anthropology 日本生理人類学会 8 (4) 183 - 190 1342-3215 2003/11 [Refereed]
    The purpose of this paper is to summarize the current status of improving the residential settings for the elderly and to discuss the future issues in the relating field. This study focuses on the importance of minimizing relocation shock that the elderly experience in the process of moving to a new facility and of the physical environment which facilitates adaptation to a new environment. Personalizing residents' rooms and planning common spaces which afford the various life patterns - this is the first endeavor seen in the improvement process at nursing homes. Spatial composi- tion in the smaller setting such as a GH is also introduced as another key factor in the process at the large facility. This paper also introduces "Group House AMAGASAKI" as the most leading case.
  • OTSUKA Takao; SAITO Yoshinori; YAMAWAKI Hiroki; YAMAGUCHI Kentaro; MIURA Ken; TOYAMA Tadashi
    Journal of architecture,planning and environmental engineering 一般社団法人日本建築学会 68 (569) 47 - 54 1881-8161 2003/07 [Refereed]
    The purpose of this study is to clarify the effects of introducing adjustable wheelchairs in a nursing home.For this objective, a nursing home was surveyed by means of observations and interviews.The results are as follows. 1) The mobility of the elderly improved relatively by the use of adjustable wheelchairs. 2) The support of the seating posture became possible by the effect of the seating. The restraining straps of the wheelchair came off by the use of adjustable wheelchairs. 3) The elderlies whose behavioral patterns are improved by the use of adjustable wheelchairs are only few.lt is considered that the improvement of conciousness to the care staffs and of the surroundings which adjust the new type wheelchairs are necessary.
  • YAMAGUCHI Kentaro; TOYAMA Tadashi; MIURA Ken
    Japanese journal of physiological anthropology 日本生理人類学会 7 (2) 65 - 72 2002/05 [Refereed]
    The purpose of this study is to clarify relationship between the sleep-wake thythm and the living environment on the residents with lower level of ADL through a comparison among private rooms with a small-scale care unit and plural-bed rooms in nursing home. The results are:(1) For about 60% of the time, the residents were found awake in plural-bed rooms, and asleep in private rooms. (2) In living rooms,they were found awake for more than 90% of the time. (3) The longer the residents stay in living room, the clearer their sleep-wake rhythm become.


Books and other publications

Lectures, oral presentations, etc.

Affiliated academic society


Research Themes

  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2023/04 -2026/03 
    Author : 石井 敏; 山口 健太郎; 西野 達也
  • 日本学術振興会:科学研究費助成事業 基盤研究(B)
    Date (from‐to) : 2020/04 -2023/03 
    Author : 山口 健太郎; 山井 弥生; 井上 由起子; 石井 敏
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2017/04 -2020/03 
    Author : MIURA KEN
    This study's results show that the introduction of the intercommunication system is structured from leader-driven conversations to multipolar conversations, and it was also shown to bring effectiveness in collaboration with other staff. This effect was particularly evident in daycare facilities with large floor areas, where the number of steps was reduced by less than 30%. On the other hand, some private unit-type special nursing homes did not show a decrease in the number of steps, but the caregivers felt a reduction in the distance they moved during their work time. This is a result of the realization of the reduction in wasteful movements due to the introduction of the intercommunication system. As a result of calculating the stress of caregiving based on heart rate fluctuations, the tension was high during conversations between care staff members. This stress evidence has identified the possibility of improving communication through an intercommunication system.
  • 空間・福祉用具の観点から見た高齢者入居施設における腰痛予防に関する研究
    Date (from‐to) : 2016/04 -2019/03 
    Author : 山口 健太郎
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2014/04 -2018/03 
    Author : Mori Kazuhiko; Andersson Jonas E.; Andersson Morgan
    Welfare Transform Planning System (WTPS) is a mechanism of coordination with various stakeholders, architectural planners and engineers, firefighters, care-workers, administrators and other professionals and residents for transforming regional resources, such as detached houses, flat housings, schools, shops, and offices, to welfare facilities for children, aged people, and handicapped people. In four years, mailed questionnaires surveys to municipal government, fire department and welfare facilities, field visiting surveys of welfare transforming facilities in domestic and oversea countries, and meetings with specialists and residents were done for making WTPS clear practically. As the result, ten papers and One book ‘Architectural and regional renovation by Welfare Transforming’ with ten public suggestions are published.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2011 -2014 
    Author : YAMAGUCHI Kentaro
    The aim of this study is to clarify the way of life support service and, physical and human environments to activate the exchange of residents in elderly housing with supportive service. The results are follows.①Elderly housing with full board decreased in opportunities to go out of residence and, reduce the conversations between residents.②Elderly housing was able to make the self-determination of the care services and lifestyle in the period of long-term care need. ③Workshops in planning and design process got a better understanding of policy of operation for the elderly housing. ④ The Spatial formation close to entrance, dining room, and front desk activated the exchanges between residents. ⑤ The activation of community activities is the necessary support by the city government and, that community comprehensive care center, and that care service provider in the early stage.
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(若手研究(B))
    Date (from‐to) : 2009 -2010 
    Author : Kentaro YAMAGUCHI
    This study makes to clarified about the effectiveness of small-scale service station with multi-function of two viewpoints. The first point is attached type of the rental housing for the elderly. The other point is small-scale service sphere. The interviews with the staff and the residents' behavior tracking survey, consulting the users' care-manegement records were performed for this study. The results are as follows. (1) The attached type of the rental housing for the elderly provided frequent home help during night. (2) After discharge from hospitals, to return homes quicken obviously. (3) Facilities downsizing of service sphere provided home help based on individual care.

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Media Coverage

  • 住み慣れた地域の中でのとも暮らし -ホームホスピス
    Date : 2024/02
    Writer: Myself
    Publisher, broadcasting station: 株式会社Speee
    Program, newspaper magazine: ケアスル介護
    https://caresul-kaigo.jp/column/articles/34208/ Internet