This project involved converting a wooden house in Agatsuma District, Gunma Prefecture, into a hair salon. The client requested a distinctive interior suited to a salon, along with improved insulation performance appropriate for the cold climate—all within a limited budget. To meet these needs, spray polyurethane foam insulation was applied and intentionally left exposed as an interior finish, turning a technical necessity into a design feature. Due to the frost line in the region, the building’s foundation was originally quite deep. Taking advantage of this, the cutting area was placed slightly below the original floor level, creating variation in the spatial experience. By incorporating local characteristics into the interior design, the building was transformed into a unique and original salon rooted in its regional context.












hair salon @ Agatsuma, Gunma
Design: Sunao Koase, Noriko Koba, Takeo Arika /SNARK Inc.
Steel Product: gambit
Floor area: 54.66㎡
Completion: Oct. 2022
Photo: Ippei Shinzawa
Design: Sunao Koase, Noriko Koba, Takeo Arika /SNARK Inc.
Steel Product: gambit
Floor area: 54.66㎡
Completion: Oct. 2022
Photo: Ippei Shinzawa