Photo #: NH 78664 Japanese Kaiyu Type Midget Submarine Out of the water and resting on blocks at a Japanese port, circa October-December 1945. This submarine appears to be one of the two-periscope training units. Halftone photograph, copied from the U.S. Naval Technical Mission to Japan Report S-01-7: Characteristics of Japanese Naval Vessels, Article 7: Submarines, Supplement II, January 1946, page 134, figure 153. U.S. Naval History and Heritage Command Photograph.