This research aims to examine the company towns of Hitachi, Ltd. and the residential area plans formulated by Yoshikazu Uchida during World War II, focusing on the Hitachi, Taga, and Mito works. Yoshikazu Uchida, who was Japan's leading authority in city planning and housing policy during the war, designed advanced residential area plans for Hitachi, with reference to Western housing and the neighborhood unit. It has been recognized that his work illustrates some of the possible theoretical achievements in city and residential area planning at that time.