The Hokuriku Bank, Niigata Branch was designed by Tetsuro Yoshida in his later life. Torakichi Sawa assisted in the design after Yoshida suffered from a brain tumor. Therefore, there are many architectural documents made by Yoshida instructing design for Sawa in NTT FACILITIES, INC. As a result of analyzing these documents, we discovered that the design process could be divided into 5 phases depending on the content under. Although, Yoshida’s surgery was not successful, he continued to it on his own initiative until the building was completed. Yoshida’s idea of architecture was recorded in these architectural documents.