This paper reports the construction process and the architectural features of Old Adachi Villa in Hayama (Kanagawa) 1933, designed by Koichi SATO (1878-1941). This house constructed by the dry construction method called as TROCKEN BAU, and its appearance is half-timber design. Especially, the fiberboard ‘Toma-tex’ produced by Oji Paper Co., Ltd. (Tomakomai) was used at any part of this house adopting various patterns of combination, even as roof base or exterior material. These features were caused by the relationships between the owner Tadashi ADACHI who was the president of Oji Paper and the architect SATO who was a professor of Waseda University.
