Kitazumi's early photographic assignments included the trips to Karafuto (Sakhalin) and Mount Kumgang (now in North Korea).
As United States Navy forces had driven the Japanese out of the Aleutian Islands in late 1943 to early 1944, an organizational structure was required to coordinate Japan’s northern defenses against the possibility that the United States would extend operations from the Aleutians into the Chishima Islands, Karafuto and to northern Japan itself.
The geography of each region in Japan is presented from chapter three onwards and Karafuto, Chosen, Formosa, Kantoshu in China, in addition to the Japan mainland.