There are some telephone exchange office buildings which resemble "A PROJECT OF TELEPHONE EXCHANGE OFFICE" proposed by Mamoru YAMADA in design : the building of Hyogo, Fukuoka and Shimonoseki. This paper clarify that these building designs are mainly produced by Taiji MORI, Nobuo WADA and Akira UENAMI (under the direction of WADA) with the systematic design method accumulated at the Building Repair Section of the Ministry, and that their design attempts break with traditional character and provide the background of YOSIDA and YAMADA's first developements of Modern architecture. With this viewpoint, we estimate Mori's projects and his contribution to the architectural works of this Section.
