Drawing on 100 years of furniture-making skills and a discerning aesthetic, Maruni Wood Industry has launched a new piece of "purifying furniture" called "kupu sauna." This sauna, made from domestic cypress, is more than just a heating facility; it exudes presence as a "tool" that complements everyday life as part of a rich lifestyle.

Image of outdoor use / Courtesy of Maruni Wood Industry Inc.
The name "kupu" comes from the Finnish word for "covering, dome," and its half-dome shape, which gently supports the user, is a reimagining of traditional barrel design to fit into modern lifestyles. The structure, designed to allow heat and steam to circulate geometrically, is the result of intricate technology that combines machinery and artisanal techniques. Hinoki cypress from Yoshino, Nara, is used as the material. Its properties are comparable to those of aspen, a material prized in Finland as a sauna material, and it is sourced from domestic forests, proposing a culture of local production and consumption. The scent, texture, and beauty that develops over time... a perspective that simultaneously refines the elegance of furniture and the comfort of saunas is emerging. Left: Image of indoor use | Right: Interior of kupu sauna / Courtesy of Maruni Wood Industry Inc.

Product design was handled by Wataru Kumano, who spent an extended period of time living in Finland and has since become deeply acquainted with saunas and their spatial context. Exploring the relationship between woodworking and the human body, his approach to designing not only the form but also the heat circulation, quietness of sound, and even the shadows of light gives kupu sauna a quiet depth. Furthermore, by combining this with the knowledge of ONE SAUNA, developed by Libertyship, which has a deep understanding of furniture and space, the result is a product that straddles the boundaries between the precision of wooden furniture and the sensibility of sauna experience design.

Kumano Wataru/Courtesy of Maruni Wood Industry Inc.
The act of "getting organized" has now gone beyond the realm of wellness to become the key to honing the sensitivity of one's home. While "kupu sauna" is truly a pure tool for getting organized, it also embodies the universality of Maruniism and has emerged as an icon of tranquil fashion.

Exhibition at Isetan Shinjuku Store / Photo by ©FASHION HEADLINE





[Product Overview]
kupu sauna basic
Size: W1,920 x D2,000 x H2,240 mm
Material: Yoshino cypress (unpainted)
Price: ¥4,455,000 (¥4,050,000 for the unit) *Includes electric heater

Sauna heater: Electric heater type
(helo: Hanako 200V [single-phase or three-phase]) *Includes power distribution board
Other: Fixed bench / Mobile bench (small and large) / Heat guard / Heat shield / Door-side coat hangers (2) / Thermometer


From 660,000 yen (unit 600,000 yen)
* Includes miscellaneous expenses
* Electrical work is required.
* Varies depending on delivery area and installation location.


IoT sauna controller, outdoor compatible (roofing specification / tent specification)


* Updated 9/11 (images added)

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