Toshio Miyazaki (宮崎敏夫, Miyazaki Toshio, extra-December 18, 1899 – April 4, 1965) was a career officer in the Imperial Japanese Navy. He gained notoriety in the United States after his arrest and subsequent deportation for espionage activities. A protégé of Admiral Isoroku Yamamoto, during the Pacific War his anticipated promotion to the senior staff of the Combined Fleet was not realized due to Yamamoto’s death, and he ended the war with the rank of captain.