The purpose of this paper is to focus on insulation of wooden Japanese house in 1950s, and to make clear how architects have adopted insulation to their designs. Studies on following subjects were made, through researching detailed section drawings and articles in Japanese architectural journals in 1950s; 1) Ratios of insulated elements and insulation materials, 2) Details and heat performance of insulated elements, 3) Architects’ remarks on insulation, 4) Architects who were highly conscious of insulation.
