Toshio Miyazaki (少佐宮崎敏夫 Shōsa Miyazaki Toshio) was an Imperial Navy Lieutenant Commander in 1939-1940 operating in California under the cover of being an exchange student at Stanford University. He operated under the name Mr. Tanni. Immigration records disclosed that he had entered the country on August 24, 1933. His most significant accomplishment was the recruiting of an American spy, former Navy yeoman Harry Thomas Thompson in the run-up to World War II.
Author Alan Hynd wrote about the Miyazaki-Harry Thomas Thompson case in his 1943 book, Betrayal From the East: The Inside Story of Japanese Spies in America.
Captain Ellis M. Zacharias, USN, also wrote of the Miyazaki-Harry Thomas Thompson case in his 1946 book, Secret Missions. Capt. Zacharias, as a Naval Intelligence officer, was personally involved in bringing the case to trial.