KOJI TSUTSUI & ASSOCIATES
Selected Projects
Selected Projects
A selection of residential, international, interior, social, and commercial work.

01
Residential
Villa in Karuizawa
A recent representative house in Karuizawa.

02
International
Mill Valley House
A California residential work showing our office's practice.

03
Restaurant Interior
Minneapolis Restaurants
Kado no Mise, Kaiseki Furukawa and Japanese Whisky Bar restaurant interiors.

04
Residential
InBetween House
Award-winning house exploring spatial continuity between distinct volumes.

05
International
School & Home for HIV Orphans
Community-oriented project structured around village-like spatial relationships.

06
Commercial
Denkosha Headquarter
Office project built in the center of Tokyo for a company.

07
Landscape / Pool / Interior Renovation
Villa in Palo Alto
Landscape, pool and interior renovation for an existing house.

08
Residential
Industrial Designer House
A residential project with a strong formal identity for an industrial designer.

09
Interior / Office
WiL
World Innovation Lab office interior project.
About
Profile
KOJI TSUTSUI
Koji Tsutsui founded Koji Tsutsui & Associates in 2004, with offices in Tokyo and California. After working at Tadao Ando Architect & Associates in Japan, he continued his studies at the Bartlett School of Architecture, University College London. He later worked at Mark Cavagnero Associates in San Francisco from 2007 to 2010. This experience became the starting point for his long-term connection with the United States. Through these international experiences, the practice develops architecture that connects landscape, community, and culture across Japan and the United States.
Education
University of Tokyo / Bartlett School of Architecture, University College London
University of Tokyo / Bartlett School of Architecture, University College London
Practice
Tadao Ando Architect & Associates / Mark Cavagnero Associates / Koji Tsutsui & Associates
Tadao Ando Architect & Associates / Mark Cavagnero Associates / Koji Tsutsui & Associates
Academic
UC Berkeley Visiting Associate Professor
UC Berkeley Visiting Associate Professor
Recognition
World Architecture Festival, Winner / Architectural Record Design Vanguard / Architectural League Prize
World Architecture Festival, Winner / Architectural Record Design Vanguard / Architectural League Prize
News
Current notes
2025 - Villa in Karuizawa completed
2024 - Villa in Palo Alto completed
2020 - Denkosha Headquarter completed
Ongoing - San Francisco residential project
Project Archive
Project categories
Category
Residential
- Villa in Karuizawa
- Villa in Palo Alto
- InBetween House
- Mill Valley House
- Industrial Designer House
- Bent House
- Yutenji House
- Extended Engawa House
- Noh House
- Case Study Biotope Housing
Category
Commercial
- Denkosha Headquarter
- WiL
- Kado no Mise & Kaiseki Furukawa
- CVC
- Bar Clan
- Abeno Too
Category
International
- Mill Valley House
- School & Home for HIV Orphans
- Mission in Haiti
- San Francisco Residential Project (ongoing)
Category
Research / Concept
- Case Study Biotope Housing
- Relief Projects
- Haiti Concepts