
NOT A HOTEL NASU
MASTERPIECE
Expertise
Business Development
Project Management
Design
Brand Direction
CG Visualization
Life Cycle Management
Hotel Management
A Floating Home Overlooking a Vast Highland – “NOT A HOTEL NASU MASTERPIECE”
Situated on a vast 530,000㎡ highland, NOT A HOTEL NASU MASTERPIECE is a striking floating residence designed by Makoto Tanijiri and Ai Yoshida of SUPPOSE DESIGN OFFICE. Seamlessly blending with nature, the 4-bedroom home features 286㎡ of indoor space and a 214㎡ terrace. The living and dining area centers around an iconic fireplace and opens directly onto the terrace, offering uninterrupted views of Nasu’s majestic scenery. A cantilevered pool extends into the sky, giving the sensation of floating in the highland breeze. The two-level layout accommodates up to 10 guests, complete with three bedrooms, a study, private onsen with natural hot spring water, sauna, cold plunge pool, and fireplace. Every detail—from materials to layout—is designed in harmony with nature, allowing guests to immerse themselves in the beauty of the changing seasons in this one-of-a-kind floating retreat.

Makoto Tanijiri
Architect

Ai Yoshida
Architect
Collaborators
NOT A HOTEL ARCHITECTS









Spec
Building Name
NOT A HOTEL NASU MASTERPIECE
Location
1291-7 Sahara, Ōtawara-shi, Tochigi 324-0403, Japan
Completion
2022/9
Site Area
500.97㎡(286.09㎡ + 214.88㎡)
Building Footprint
286.09㎡
Total Floor Area
286.09㎡














Junpei Yusa
Brand Director
SUPPOSE DESIGN OFFICEが掲げる「間に生まれるラグジュアリー」という思想の質をさらに高めるため、私たちは家具・什器・備品を空間に寄り添うよう一つひとつ丁寧に製作・選定しています。
内装では、重要性の高い造作家具について設計者と綿密に議論を重ねるなかで、NOT A HOTELのベースとなる造作家具の在り方を見出すことができました。
外装にはコールテン鋼を採用し、造船技術を応用して目地のない一枚仕上げで建物全体を包み込んでいます。この品質と工期を両立させることは容易ではありませんでしたが、素材の持つ重厚さと温かみが調和した、静かな力強さを感じる外装に仕上がりました。
時間の経過とともに色合いと質感が深まり、周囲の自然と溶け合うように姿を変えていく。その変化こそ、この建築の魅力だと感じています。