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Affiliation |
Faculty of Urban Innovation, Division of Urban Innovation |
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Job Title |
Associate Professor |
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Research Fields, Keywords |
Urban Design, City Planning |
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Mail Address |
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YABUKI Ken-ichi
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Education 【 display / non-display 】
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2015.4-2018.3
The University of Tokyo Doctor Course Completed
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2010.4-2012.3
The University of Tokyo Master Course Completed
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2006.4-2010.3
University of Tsukuba Graduated
Degree 【 display / non-display 】
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Doctor of Engineering - The University of Tokyo
Campus Career 【 display / non-display 】
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2022.10
Duty Yokohama National UniversityFaculty of Urban Innovation Division of Urban Innovation Associate Professor
External Career 【 display / non-display 】
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2021.4-2022.9
The University of Tokyo Research Center for Advanced Science and Technology Project Research Associate
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2019.4-2021.3
Kobe Design University Department of Environmental Design Assistant Professor
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2012.4-2015.5
KUME SEKKEI Co. Ltd.
Academic Society Affiliations 【 display / non-display 】
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2012
The City Planning Institute of Japan
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2010
Architectural Institute of Japan
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2019
Association of Urban Housing Sciences
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2012
Japan Association for Real Estate Sciences
Research Areas 【 display / non-display 】
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Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Architectural and city planning / City Planning
Books 【 display / non-display 】
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都市を学ぶ人のためのキーワード事典 : これからを見通すテーマ24
饗庭 伸 , 矢吹 剣一 （ Role： Joint author）
学芸出版社 （ ISBN:9784761528706 ）
Language：Japanese Book type：Scholarly book
Papers 【 display / non-display 】
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A study on the process and actual conditions of converting multiple streets into plazas in Portland, Oregon, U.S.
Okumura Maki, Nohara Taku, Yabuki Ken-ichi, Morita Ayaka, Matsuyuki Mihoko
Journal of the City Planning Institute of Japan 60 ( 3 ) 1138 - 1145 2025
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The City Planning Institute of Japan Joint Work
<p>This study examines Portland's Public Street Plaza Program (PSPP), focusing on the factors and spatial realities behind the rapid conversion of streets into plazas during the pandemic. Through literature review and field research, the study identified key factors: (1) pilot programs for assessing plaza suitability, (2) reversibility allowing roads to return to vehicle use, (3) easy-to-install and remove furniture, (4) a bottom-up process initiated by local residents and businesses, and (5) a clear division of roles between PBOT and local stakeholders. The plazas function as community hubs, but challenges remain in balancing public and commercial use, requiring ongoing efforts to address these issues.</p>
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A Study on the Development of Agile Urban Space Management Triggered by the COVID-19 Pandemic
Morita Ayaka, Yabuki Ken-ichi, Nohara Taku, Okumura Maki
Journal of the City Planning Institute of Japan 60 ( 3 ) 1162 - 1169 2025
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The City Planning Institute of Japan Joint Work
<p>In recent years, the utilization of public space has gained attention as a strategy for urban revitalization, highlighting the need for flexible, agile urban management. This study examines the institutional evolution in New York City from the temporary “Open Restaurant” system introduced during the COVID-19 pandemic to the permanent “Dining Out” program. Focusing on three programs―Sidewalk Café, Open Restaurant, and Dining Out―we analyzed official documents, literature, and citizen feedback from NYC311 and online platforms. The findings reveal that NYC responded rapidly to crisis conditions while continuously updating rules through participatory input. This case illustrates the effectiveness of agile urban management in unpredictable times and offers valuable insights for other cities facing similar challenges.</p>
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Takai Yuki, Nohara Taku, Yabuki Kenichi, Yoon Jangshik
Journal of the City Planning Institute of Japan 59 ( 3 ) 1131 - 1138 2024.10 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The City Planning Institute of Japan Joint Work
<p>To promote the establishment of civic green spaces, it is important to establish effective management methods, such as maintenance and management by residents. However, it has become clear that there are challenges in securing manpower. This study was conducted to clarify effective measures for expanding management by residents focusing on Nerima Ward, where measures were implemented to increase the number of people responsible for the management, by interviewing local governments and maintenance organizations. it was found that, because of the municipality's broad-based recruitment efforts, new groups, mainly of the younger generation, began to participate with a variety of objectives. In addition, as the number of groups increased, the local government implemented support in an ingenious way despite manpower constraints.</p>
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Study on the Actual Situation of Non-residential Land Uses Located in Residential-Only Areas
Matsumoto Nozomi, Nohara Taku, Yabuki Ken-ichi, Yoon Jangshik
Journal of the City Planning Institute of Japan 59 ( 3 ) 651 - 658 2024.10 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The City Planning Institute of Japan Joint Work
<p>Sasuke area in Kamakura City has a variety of non-residential buildings, even though this area is designated as a First- Class Low-Rise Residential Zone. These buildings often reflect the identity of their owners and the community, with a recent trend showing a rise in both their numbers and types of use. Despite the absence of district plans or regulations, Sasuke area hasn't experienced notable neighborhood troubles. This is likely due to owners managing their properties and operations as residents. In a First-Class Low-Rise Residential Zone, the building regulations typically require mixed-use residences for non-residential purposes, making the relationship between operators and the community crucial. This dynamic may contribute to balancing the charm of a quiet residential area with the diversity of uses.</p>
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Study on the process and factors of development of multiple community bases
Morita Ayaka, Nohara Taku, Yoon Jangshik, Yabuki Ken-ichi
Journal of the City Planning Institute of Japan 59 ( 3 ) 643 - 650 2024.10 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The City Planning Institute of Japan Joint Work
<p>Recently, population aging and the weakening of local communities in the suburbs is problems, and there is a demand for the establishment of community bases where local residents can participate in community activities. This study focuses on Musashishinjo area to clarify the process and factors behind the establishment of multiple community bases. Through interviews with the places and related groups, following conclusions were obtained. Their establishment involved collaboration from five key entities: land/building owners who envisioned creating communal spaces, operators seeking community engagement, architect adapting spaces for public use, proactive users driving activities, and supporters providing project management and funding. This cooperative effort led to the opening of multiple community bases, fostering regional community development.</p>
Review Papers 【 display / non-display 】
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矢吹剣一
すまいろん ( 114 ) 36 - 39 2024.2
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Single Work
Awards 【 display / non-display 】
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第5回 博士論文賞
2020.6 住総研
Individual or group name of awards：矢吹剣一
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都市住宅学会賞研究奨励賞
2019.10 都市住宅学会
Individual or group name of awards：矢吹剣一
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第17回 2019年度 研究・実践選奨 奨励賞
2019.6 住総研
Individual or group name of awards：矢吹剣一・黒瀬武史
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論文奨励賞
2019.4 日本都市計画学会
Individual or group name of awards：矢吹剣一
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湯浅賞（研究奨励賞／博士論文部門）
2018.11 日本不動産学会
Individual or group name of awards：矢吹剣一
Grant-in-Aid for Scientific Research 【 display / non-display 】
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都市の趨勢に応じたダウンゾーニング技術の体系化
Grant number：24K17414 2024.4 - 2027.3
Grant-in-Aid for Early-Career Scientists
Authorship：Principal investigator Grant type：Competitive
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人口減少に対応したダウンゾーニングの合意形成と計画技術
Grant number：19K15166 2019.4 - 2023.3
Grant-in-Aid for Early-Career Scientists
Authorship：Principal investigator Grant type：Competitive
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戦略と戦術を往来するアジャイル（応答）型都市デザインマネジメント手法の構築
Grant number：23H01581 2023.4 - 2026.3
Grant-in-Aid for Scientific Research(B)
Authorship：Coinvestigator(s) Grant type：Competitive
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人口減少都市のアーバンデザイン手法の体系化と空き不動産の選択的再生に関する研究
Grant number：22K04455 2022.4 - 2025.3
Grant-in-Aid for Scientific Research(C)
Authorship：Coinvestigator(s) Grant type：Competitive
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人口減少・生活様式の変化に対応した商業地域の再編手法
Grant number：22K04504 2022.4 - 2025.3
Grant-in-Aid for Scientific Research(C)
Authorship：Coinvestigator(s) Grant type：Competitive
Other external funds procured 【 display / non-display 】
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人口減少都市シンポジウム2023
2023.4 - 2024.3
Private Foundations 国際研究集会援助
Authorship：Principal investigator
Presentations 【 display / non-display 】
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市街地に残存する中世古道の実態 -横浜市内の旧鎌倉街道を対象として-
小﨑大耀、高見沢実、野原卓、矢吹剣一、尹 莊植
日本建築学会大会（関東） 2024.8 日本建築学会
Event date： 2024.8
Language：Japanese Presentation type：Oral presentation (general)
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市民緑地制度における維持管理主体の拡充に関する研究 -練馬区憩いの森における区民管理に着目して-
高井優紀、高見沢実、野原卓、矢吹剣一、尹莊植
日本建築学会大会（関東） 2024.8 日本建築学会
Event date： 2024.8
Language：Japanese Presentation type：Oral presentation (general)
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都心部における複数都市公園の再整備を通じた都市再生に関する研究 ― 池袋4公園構想を対象として ―
茅嶋亮佑、高見沢実、野原卓、矢吹剣一、尹莊植
日本建築学会大会（関東） 2024.8 日本建築学会
Event date： 2024.8
Language：Japanese Presentation type：Oral presentation (general)
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人口動態から見る集約化と公共交通の関係に関する研究 岐阜市の多核的ネットワークを対象として
小倉大輝、高見沢実、野原卓、矢吹剣一、尹莊植
日本建築学会大会（関東） 2024.8 日本建築学会
Event date： 2024.8
Language：Japanese Presentation type：Oral presentation (general)
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ランドレベルの空間形態が外部空間利用者に与える影響に関する研究 みなとみらいグランモール公園の滞留行動に着目して
横山創紀、高見沢実、野原卓、矢吹剣一、尹莊植
日本建築学会大会（関東） 2024.8 日本建築学会
Event date： 2024.8
Language：Japanese Presentation type：Oral presentation (general)
Charge of on-campus class subject 【 display / non-display 】
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2025 Environmental Urban Design Studio F
Interfaculty Graduate School of Innovative and Practical Studies
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2025 Urban Science S (Social Practice)
College of Urban Sciences
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2025 Globalized Local Studies
Liberal Arts Education
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2025 Urban Management
Graduate School of Urban Innovation
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2025 Urban Innovation and New Challenges Ⅰ
Graduate School of Urban Innovation
Committee Memberships 【 display / non-display 】
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日本建築学会論文集委員会 委員
2024.4
Committee type：Academic society
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日本建築学会空き地から構想する都市戦略小委員会 委員
2023.4
Committee type：Academic society
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横浜市土地利用審査会 委員
2023.3
Committee type：Municipal
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坂井市 歴史まちづくり推進協議会 委員
2022.10 - 2024.3
Committee type：Municipal
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日本建築学会技術報告集委員会 委員
2022.6 - 2024.5
Committee type：Academic society
Social Contribution(Extension lecture) 【 display / non-display 】
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YNUアーバニストスクールプログラム2024
Role(s)： Lecturer, Logistic support
横浜国立大学大学院都市イノベーション学府・研究院 2024.10 - 2024.12
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YNUアーバニストスクールプログラム2023
Role(s)： Lecturer, Logistic support
横浜国立大学大学院都市イノベーション学府・研究院 2023.10 - 2023.12