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The tea room makes no concession to its setting. Despite being many floors above street level, the space achieves the atmosphere of a full traditional chashitsu — an unlikely but complete world within the fabric of a contemporary office building. The thatched roof, shared across both spaces, is the architectural gesture that makes this possible.
The project was conceived as a response to shifting ideas about how and where work happens — a space that brings a different quality of attention to the working day.




































































































A chashitsu and meeting room built within a single floor of a high-rise office building — two interconnected spaces sharing a traditional thatched roof.
The tea room makes no concession to its setting. Despite being many floors above street level, the space achieves the atmosphere of a full traditional chashitsu — an unlikely but complete world within the fabric of a contemporary office building. The thatched roof, shared across both spaces, is the architectural gesture that makes this possible.
The project was conceived as a response to shifting ideas about how and where work happens — a space that brings a different quality of attention to the working day.
Arakawa is a tempura restaurant with 45 years of history in Kita-ku, Tokyo. When the time came to move to a new space in Akabane, the owners wanted to carry that history with them.
The interior was built by the same craftsmen who construct chashitsu. Sugi pillars, solid oak counters, and a raised oval ceiling in gold leaf draw on the Edo-period aesthetic of the traditional Japanese room. Latticed rafters, sliding doors, and a tsukubai mark the entrance. Moveable partitions allow the dining room to be reconfigured by party size, with a private tatami room at the rear.
Materials from the original restaurant — floor pillars, garden stones, the signboard — were retained and reintegrated throughout.


























Arakawa is a tempura restaurant with 45 years of history in Kita-ku, Tokyo. When the time came to move to a new space in Akabane, the owners wanted to carry that history with them.
The interior was built by the same craftsmen who construct chashitsu. Sugi pillars, solid oak counters, and a raised oval ceiling in gold leaf draw on the Edo-period aesthetic of the traditional Japanese room. Latticed rafters, sliding doors, and a tsukubai mark the entrance. Moveable partitions allow the dining room to be reconfigured by party size, with a private tatami room at the rear.
Materials from the original restaurant — floor pillars, garden stones, the signboard — were retained and reintegrated throughout.
A single-tatami chashitsu built within a bonsai tea house and gallery, designed for one purpose: to sit with a bowl of matcha and the company of an ancient, magnificent bonsai.
The room contains everything a chashitsu requires, and nothing more. A tokonoma alcove, a tea shelf, a tatami seat and bench seating are arranged within a compact but complete space. The entrance is a sliding door designed in the manner of a nijiriguchi. The room is soundproofed to invite stillness.








A single-tatami chashitsu built within a bonsai tea house and gallery, designed for one purpose: to sit with a bowl of matcha and the company of an ancient, magnificent bonsai.
The room contains everything a chashitsu requires, and nothing more. A tokonoma alcove, a tea shelf, a tatami seat and bench seating are arranged within a compact but complete space. The entrance is a sliding door designed in the manner of a nijiriguchi. The room is soundproofed to invite stillness.