The island was never captured , and at the end of World War II , some 25,000 troops in the island chain surrendered . Thirty Japanese soldiers were court-martialled for class " B " war crimes , primarily in connection with the Chichijima incident and four officers ( Major Matoba , General Tachibana , Admiral Mori , and Captain Yoshii ) were found guilty and hanged . All enlisted men and Probationary Medical Officer Tadashi Teraki were released within 8 years
class " B " war crimes
Japanese war crimes
Chichijima