Harry Thomas Thompson (born 1908, date of death unknown) was a United States Navy yeoman who spied for Japan against the United States in 1934–35. He was the first American to be convicted of espionage after World War I. Unfortunately for Thompson, the Director of the Office of Naval Intelligence (ONI), Capt. William D. Puleston, took a personal interest in so-called language students like Miyazaki. His suspicions were borne out when Japanese coded radio messages were intercepted and deciphered.