At least two US citizens of Japanese descent served in the Japanese military on Chichijima during the war, including Nobuaki "Warren" Iwatake, a Japanese-American from Hawaii who was drafted into the Japanese Imperial Army while living with his family back in Hiroshima.
Sedikitnya dua warga negara Amerika Serikat keturunan Jepang berdinas sebagai tentara Jepang di Chichi Jima semasa perang, termasuk Nobuaki "Warren" Iwatake, warga Amerika-Jepang dari Hawaii yang terkena wajib militer sewaktu tinggal bersama keluarga di Hiroshima.