Japanese architect Shigeru Ban has designed two new public toilets of glass, located in the city’s Yoyogi Fukamachi Mini Park and the Haru No Ogawa Community Park, boths in Yoyogi Park in the Shibuya ward, Tokyo as part of the Tokyo Toilet Project.

The public toilets have been made of glass. Using a new technology,  Shigeru Ban designed the toilets with two key points in mind: cleanliness and security. Two especial aspects we all take into consideration when entering a public restroom.

According Shigeru Ban, there are two things we worry about when entering a public restroom, especially those located in parks. The first is whether it is clean inside, and the second is that no one is secretly waiting inside. Using a new technology, we designed the outer walls with glass that turns opaque when locked. This allows users to check the cleanliness and whether anyone is using the toilet from the outside. At night, the facility lights up the park like a beautiful lantern.

These toilets, divided into three cubicles where every room has color match the hues found on parks, is composed of women’s, men’s and an accessible facility bathroom.
Users can know if the toilets are empty from far away, as the glass exterior will be transparent if the bathroom is empty, making it particularly useful and safe at night.

The Tokyo Toilet, is a program by The Nippon Foundation aimed at renovating seventeen public toilets in Shibuya, by 16 leading creators, in cooperation with the Shibuya City government. Five of the locations are open as of August: designs by Masamichi Katayama / Wonderwall, Shigeru Ban (2), Fumihiko Maki, and Nao Tamura. On August 31will open In Nishihara Itchome Park the project by Takenosuke Sakakura, and on September 7 in Jingu-Dori Park will be the proposal by Tadao Ando, with the remainder completed by spring 2021.

The toilets are being built by Daiwa House Industry Co. Ltd., with Toto Ltd. advising on toilet equipment and layout. In addition to the construction, ever-important maintenance of the facilities will be carried out under a three-party agreement between The Nippon Foundation, the Shibuya City government, and the Shibuya City Tourism Association.

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Location
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- Yoyogi Fukamachi Mini Park, 1-54-1 Tomigaya. Tokyo. Japan.
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- Haru-no-Ogawa Community Park, 5-68-1 Yoyogi. Tokyo. Japan.

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Completed.- July 31, 2020.

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Satoshi Nagare, SS Co.,Ltd. Hojo Hiroko.

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Shigeru Ban was born in Tokyo on August 5, 1957, growing up in a creative and cultured household. Ban’s family lived in a wooden house that was often renovated, and a young Ban became fascinated with the traditional work of carpenters. He enjoyed using leftover wood pieces to build things and decided he wanted to become a carpenter himself.

In 1977, Ban moved to California to study English. He chose the newly founded Southern California Institute of Architecture (SCI-Arc). After completing his fourth year at SCI-Arc in 1980, Ban successfully transferred to Cooper Union. There, his classmates included his future New York office partner, Dean Maltz, and other notable architects. He studied under influential figures like Ricardo Scofidio, Bernard Tschumi, and John Hejduk. Before his final year, Ban took a leave of absence to work at Arata Isozaki’s office in Tokyo. He returned to Cooper Union and earned his Bachelor of Architecture in 1984.

Ban started his own practice in Tokyo in 1985 without any prior work experience. He also worked as a curator for the Axis Gallery, where he designed exhibitions for Emilio Ambasz, Alvar Aalto, and Judith Turner. During the Aalto exhibition, he first developed the paper-tube structures that would become his signature. He continued to explore his ideas through a series of case study designs, including the “Curtain Wall House,” “Wall-Less House,” and  “Naked House.”

A hallmark of Ban's practice is his pioneering use of humble, renewable materials, particularly paper and timber. What began as an effort to minimize waste in exhibition design evolved into a revolutionary structural system. His work with paper tubes, from temporary disaster relief shelters to the permanent Cardboard Cathedral in Christchurch, New Zealand, demonstrates how inexpensive, recyclable materials can create elegant and resilient structures.

Ban’s commitment to service is as foundational as his material innovations. In 1995, following the Kobe earthquake, he founded the Voluntary Architects’ Network (VAN), an NGO dedicated to providing disaster relief worldwide. He believes the skills of an architect should not be reserved for the privileged. This conviction has driven VAN to complete over 50 projects in 23 countries, from paper log houses for refugees in Rwanda and Maui to privacy partitions for Ukrainian refugees.

Ban’s philosophy has driven groundbreaking innovations in mass timber architecture. A prime example is the Swatch and Omega Campus (2019) in Biel, Switzerland, which showcases a variety of post-and-beam and gridshell structures. Constructed using 160,000 cubic feet of sustainably sourced Swiss wood, it stands as one of the largest mass timber projects globally. Remarkably, this volume of wood could be regrown domestically in just 10 hours, representing a mere 0.1% of Switzerland’s annual timber production.

Other significant achievements include GC Osaka (2000), where Ban ingeniously used wood to fireproof steel; the Vierendeel gridshell of the Centre Pompidou-Metz (2010); the space frame roof of the Aspen Art Museum (2014); the hardwood joints of the Tamedia Office Building (2013); and Tamadic Nagoya (2021), an office building where Ban employed cross-laminated timber (CLT) as permanent formwork to create a biophilic environment, overcoming code restrictions that prohibited timber as a primary structural material. In the U.S., projects like the Aspen Art Museum (2014) and New York’s Cast Iron House (2025) showcase his sensitivity to context and ability to honour tradition while advancing the future of architecture.

In acknowledgement of his multifaceted and innovative career, Ban has received numerous prestigious international accolades. These include the Pritzker Prize (2014), France’s L’Ordre des Arts et des Lettres (2014), the Mother Teresa Social Justice Award (2017), the Princess of Asturias Award for Concord (2022), and the Praemium Imperiale for Architecture (2024).

For over 30 years, Ban has also been a dedicated educator, sharing his methods with the next generation of architects at universities like Harvard, Cornell, and Columbia. He empowers students through hands-on building, often involving them in VAN projects, and demonstrating that architecture can be a powerful form of service. Shigeru Ban’s career is a strong reminder of our profession’s potential to create a more sustainable and equitable world.

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Published on: August 16, 2020
Cite:
metalocus, JOSÉ JUAN BARBA
"Transparent-opaque, clean and safe. Yoyogi park toilets by Shigeru Ban" METALOCUS. Accessed
<https://www.metalocus.es/en/news/transparent-opaque-clean-and-safe-yoyogi-park-toilets-shigeru-ban> ISSN 1139-6415
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