This paper focuses on Akira UENAMI's architectural design of the Telephone Exchange Branch of Hiroshima Post Office built in 1928 and Hiroshima Posts and Telecommunications Office built in 1933. We try to concern real images of design activities by Akira UENAMI. In addition, this paper is consisted of 3 chapters as follows; 1) It focuses on various design activities by Akira UENAMI as a staff of the Ministry of Posts and Telecommunications. 2) It points out relations on Akira UENAMI and two buildings designed by him, Telephone Exchange Branch of Hiroshima Post Office and Hiroshima Posts and Telecommunications Office. 3) It clarifies tendency of his works comparing with the characteristics of typical buildings of the Ministry of Posts and Telecommunications.