Shou-kan was built in 1892 in Nishikatamachi, Hongo-ku, Tokyo, as part of the residence of Count Abe, the former feudal lord of the former Fukuyama domain. In 1971, Tokio Kasuga, founder of Green Stamp Co., Ltd., relocated and restored it to Karuizawa, where it has been used as a memorial hall for the Green Stamp Karuizawa dormitory. In 2020, Shou-kan was renovated at the same time as the new annex as a retreat facility for both Green Stamp Co., Ltd. and Kenedix, Inc. We were responsible for the design and interior administration of the Shou-kan renovation, including seismic retrofitting, as well as the installation of FF&E for the entire facility. [Social Issues / Customer Issues / Requests] Various extensions and renovations have been made since the original relocation, and the only connection to the annex was via a corridor, which caused structural stress and led to subsidence. The entire facility was aging, and the Shoyukan was difficult to use in winter due to Karuizawa's climate, and although it was originally designed with tatami mats, its use had decreased due to changes in Japanese lifestyles. However, they wanted to renovate it while preserving as much of its original appearance as possible. [Solution] After investigating the Shoyukan, they restored it to its original simple form as much as possible, performed a seismic diagnosis, and reinforced the structure to withstand earthquake forces equivalent to those stipulated in the Building Standards Act. The building faces the annex across the courtyard, giving it a sense of unity as a whole facility. While respecting the original design as much as possible, they aimed to extend the period of use, including in winter, except for the coldest months, by installing insulation and air conditioning equipment in the parts that cannot be seen. They installed floor heating and replaced it with flooring, and the walls added for seismic resistance expressed the original walls, fixtures, and image of the time, while the upper half of the space retained as much of the original design as possible. <Our project members> [Sales] Kayumi Tatsumi [Survey, design, layout and interior administration] NAU1: Norio Koito [Production and construction] Mikiya Fujitaka
