Interior

伝統

(DENTOU) Tradition
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About Us

Since inception, Saisei has taken on the challenge of designing spaces that not only stand the test of time but evolve with it.

Craftsmanship
OUR PHILOSOPHY

Saisei (再生) was founded with a singular vision: to redefine architecture by harmonizing cutting-edge innovation with the principles of sustainability and tradition.

Rooted in Tokyo, our story is one of rebirth. We assume the responsibility of building spaces that honor the environment.

Regeneration (01)
Innovation (02)
Sustainability (03)

What We Stand For

Tatami Room

We believe that architecture is a dialogue between the past and the future. Every structure we build is a testament to the enduring power of thoughtful design.

Our team is driven by a shared passion for craft, culture, and community. We don't just build buildings; we create environments that inspire connection.

AWARDS
Recognition
(01)

Awwwards

Honorable Mention 2025
(02)

CSS Design Awards

Site of the Day 2025
(03)

ArchDaily

Project of the Year 2024
(04)

Dezeen

Interiors Longlist 2024

挑戦者

(CHOUSENSHA)

"To be a challenger is to embrace the unknown."

We constantly push ourselves to explore new materials, techniques, and ideas. This spirit of 'Chousensha' ensures that no two Saisei projects are ever the same.