Atmosphere to Architecture
Designing Architecture from Atmosphere

KHAATT is an architectural design studio led by architects and interior designers.
We pursue design in which architecture and interiors form a seamless whole.

We value atmosphere.
Human gestures, the interplay of light and shadow, the expression of materials — to envision the atmosphere that resides within a space, we start with a small scene, drawing inspiration from conversations with our clients and the context of the site. From that initial atmosphere, we extend outward, connecting objects, furniture, interior finishes, the quality of light, structural systems, and the local environment, shifting scales as we design.
When atmosphere connects seamlessly, architecture becomes attentive to its inhabitants, endures over time, and settles gently into its surroundings.

From subtle atmospheres to architecture rooted in its local environment.
This is the approach to architecture that KHAATT aspires to.

[Atmosphere] = subtle presence, ambiance, or aesthetic

© Nanako Ono

Keyaki Hyakutake

1991

Born in Tokyo

2009

Ohyu Gakuen Girl's High School

2013

Waseda University
(B.A in Architecture)

2015

École nationale supérieure d'architecture de Paris-La Villette (ENSAPLV) Exchange program

2016

Waseda University
(M.A in Architecture)

2016 – 2025

NIKKEN LTD. (Architect)

2025 –

KHAATT (Architect)

Tao Tanaka

1989

Born in Kobe

2008

Hyogo Prefectural High School

2012

Kyoto Institute of Technology
(B.A in Architecture)

2014

Kyoto Institute of Technology
(M.A in Interior Design)

2014 – 2021

ILYA CORPORATION
(Interior Designer)

2021 – 2023

Souzou-Kei Real Estate,Inc
(Real Estate Agent)

2025 –

KHAATT (Interior Designer)