17th JTA Toilet Award in 2025 Result
15 November 2025
Japan Toilet Association (JTA) Toilet Award Committee
Submitted Works
Total 38 works
（Production Category：12，Technology and R&D Category：8, Maintenance/Management/Operation Category：4, Social Activity Category：14）
Selection Method
- Selection Judging：JTA Toilet Award and Incentive Award were selected through a review by the judging committee and the association’s steering committee, and then a final review was conducted by the judging committee.
- Selection by the visitors：Voting by 79 venue participants of The Toilet symposium
JTA Toilet Award Selection Committee Member
– Committee Chairperson: Kazunori Nakano, Ph.D. (Professor, College of Engineering, Nihon University / Ecological Engineering, Environmental Engineering)
– Deputy Committee Chairperson: Natsuko Nagasawa, Dr. Engineering (Professor, Faculty of Core Research, Ochanomizu University /Architectural Planning, Environmental Psychology)
Each Category committee members
A) Production Category:
Natsuko Nagasawa, Dr. Engineering (Professor, Faculty of Core Research, Ochanomizu University
/Architectural Planning, Environmental Psychology)
Junko Kobayashi, Ph.D. (Emeritus JTA chairperson, CEO of Gondola Toilet Design Office/ Architecture)
B) Writing / Research Category:
Yoshihiko Kawauchi, Ph.D. (Former professor of Toyo University / Universal Design)
Yoshiyuki Ueno, Ph.D. (JTA deputy chairperson, former professor of Chiba Institute of Technology /
Ergonomics)
C) Maintenance/ Management/ Operation Category:
Nobutaka Yamato (CEO of Amenity Co., Ltd./ Toilet Maintenance)
Katsuya Ariizumi (Odakyu Building Services Co., Ltd. Quality Control Promotion Department / Quality Control, Urban Environment, Building Maintenance)
D) Social Activities Category:
Kohei Yamamoto (Chairperson of JTA, Chairperson of Dynax Urban Environment Research Institute /
Environment, Town Development)
Kazunori Nakano, Ph.D. (Deputy Committee chairperson as above)
Committee Members:
Mikiko Takahashi, Ph.D. (JTA director, R & D headquarters of COMANY INC. / Universal Design)
Naotsune Hosono, Ph.D. (Director of NPO Niimaru / ICT, Ergonomics, Universal Design)
Yasuhiro Kamiumezawa (Kamiumezawa Architectural Design Office / Architecture)
Secretary: Sachiko Azai: (JTA Toilet Award selection committee head, Gondola Toilet Design Office /
Architecture, Workshop)
Advisor：Shiohiko Takahashi（JTA Emeritus Chairperson, Emeritus Professor of Kanagawa University/
Architecture and urban design）
| 17th JTA Toilet Award in 2025 Results | 11-Nov-25 | |
| Japan Toilet Association (JTA) Toilet Award Steering Committee | ||
| ■ Award Results | ||
| JTA Toilet Award | ||
| Production Category | Koyaike Park Toilet | Tatsuro Inoue, Kiyoshi Toyazaki, Kazuki Nishizawa, Aiko Shiozaki (Itami City Building and Repairs Section) Takuji Kubo (Itami City Parks Section) |
| Maintenance, Management and Operation Category |
DX「AirKnock」 A toilet to reduce the congestion and visible | Kawano Takanobu（Vacant Co., Ltd.） |
| Social Activity Category | INFRASTAND –A Public Toilet as a Platform for Community Co-Creation– | Daigo Ozawa (Representative Director, Ishiwa Setsubi Kogyo Co., Ltd. / Producer of KAWAYA-DESIGN) |
| Ezloo — Comfortable Journeys From Your Hand | Ramu Harada (UN&Co., The University of Tokyo) | |
| Incentive Award | ||
| Production Category | Azuma Hyakujyuen Park Toilet | Client: Sumida Ward in Tokyo Planning and supervision: UDC Sumida, Chiba University, Hiroki Suzuki Competition Proposers: Yume Hoshino, Kanako Murayama Design supervision: Shinich Uegaito, Ichiku Kenchiku Kobo Co., Ltd. Photographer: Shintarou Sato |
| Sapporo Station toilet renovation | Raita Iwasaki、Ryukichi Imamura、Kaoru Sato （Hokkaido Railway Company ─ Shinkansen Construction Department ─ Sapporo Shinkansen Construction Office） |
|
| ECOLOGICAL TOILET OF TAIPEI DAAN PARK | Organization:Parks and Street Lights Office, Public Works Department, Taipei City Government Builder:Friends of Daan Forest Park Foundation Design:Environmental Arts Design Ltd. Construction:Shicheng Civil Engineering Industry Co., Ltd |
|
| “Toilet for all” that can be used by everyone regardless of gender – Creating a distinctive space through design, zoning, and DEI – |
Mitsuaki Yamashita, Sachiho Maeda （Electric Works Company, Panasonic Corporation） |
|
| Technology and R&D Category | Designing Inclusive Public Toilets: Wee The People | Professor Jo-Anne Bichard, Gail Ramster (Royal Collaege of Art in London, UK) |
| Maintenance, Management and Operation Category | “People-Oriented, Co-Managed, Eco-Friendly” Integrating Smart Technology for Accessible, Safe & Comfortable Toilet | Lin,Chin-Tang, (TRSV Co., Ltd.) |
| Social Activity Category | A vision that has continued for 15 years Nagasaki, a tourist city, hospitality starts from the toilet. Creatinging a friendly city for everyone by starting with the toilet |
・Harumi Takenaka (Executive Chairperson) ・Toshiyuki Yamasaki (Igrekka Ennu, Representative) ・Toshiko Matsumoto (Representative Director of Environmental Town Development Association) ・Tetsuo Yasumoto (Artquake representative, etc.) ・Tadahiro Yanagi (Director of Yanagi Clinic Medical Corporation, Individual Member of JTA) ・Chiyo Makiyama (Fukuoka branch office) ・Azusa Takenaka (City staff) ・Nanami Ito (City staff, Individual Member of JTA) ・Yusuke Shiga (LIXIL LWT Tokyo Branch, Tokyo South Second Sales Office) ・Michiko Tokunaga (Physical Therapis) ・Tomohiro Matsuo (Assistant in Nagasaki Univ. Urology section) ・Kimiko Maeda (Supporter) |
| Sparkle Group – World Toilet Day Promotion:Advancing Toilets as Public Culture, Education, and Innovation Platforms | LIN,CHIN (TANG・Sparkle Group) | |
| The Clean School Toilet Project: Educational Outreach through a Multi-Sectoral Partnership | Soichiro HIRASHIMA (H Elec Corporation) Machiko MIYACHI (Japanese Association of Accounting and Astronomy) |
|
| Future Thinking Award | ||
| Maintenance, Management and Operation Category |
Survey on the actual usage of powder corners in Expressway Rest Area restrooms. | Yuka Watanabe, Kenta Yanase（Central Nippon Expressway Co., Ltd., Tokyo Branch, Construction Division, Facilities Construction Section, Tokyo Branch, Construction Division, Facilities Construction Section） Atsushi Umayahara（Central Nippon Expressway Co., Ltd., Hadano Construction Office） Shirou Izumi, Shiori Imai, Asuka Kato（Central Nippon Highway Engineering Tokyo Co., Ltd. Facilities Engineering Department） |
| ■Voting Results | ||
| General Participant Voting Award | ||
| Sapporo Station toilet renovation | Raita Iwasaki, Ryukichi Imamura, Kaoru Sato, (Sapporo Shinkansen Construction Office) |
|
| Bad manners? There aren’t enough announcements!! | Yuichi Yamaki (Cleaning Department), Takeshi Igarashi (Cleaning Department), Yoshitaka Tanabe (Cleaning Department) |
|
| Lawson Art Toilet | Lawson, Inc. | |
Overall review
Kazunori Nakano, Ph.D. (Committee Chairperson, Professor, College of Engineering, Nihon University, Environmental Ecology Engineering)
The 2025 JTA Toilet Awards received a total of 38 submissions in four categories. This is a highest number of submissions ever. The quality of the works has also been advancing, particularly in Production Category with 12 submissions, and Social Activities category with 14 submissions. This made us quite difficult to select the award winners.
In the past, there were many cases where the categories they were submitted to were inappropriate from the judging point of view and to give it a low score eventually. Therefore, in 2025, we made open the judging evaluation criteria for each category in order to eliminate such discrepancies in the categories to be submitted. However, there were still cases where it seemed that a work would receive a higher evaluation to be submitted to a much proper category. Hence the committee will continue making improvements to reduce such discrepancies.
In 17th JTA Toilet Award in 2025, four works were conferred JTA Toilet Award, nine were Incentive Award, one was Future Thinking Award and three were General Participant Voting Award. Even the works that were not selected this time had their outstanding points. It is unfortunate that we are only able to award a limited number of awards. It is ideal that this award has become a catalyst that publicizes the excellent works and activities in various toilet related fields, and that it has become to be interested in toilets for many people.
We look forward to this award again next year, and let me conclude my overall comments.
I appreciate everyone who applied or supported with the judging and voting.
Sincerely
