The Type 93 was a 610 mm -diameter torpedo of the Imperial Japanese Navy, launched from surface ships. It is commonly referred to as the Long Lance by most modern English-language naval historians, a
Type 93 torpedo, recovered from Point Cruz, Guadalcanal, on display outside U.S. Navy headquarters in Washington, D.C., during World War II
A Type 93 torpedo modified into a Kaiten, Yasukuni Shrine Yūshūkan War Memorial Museum
Kaiten were crewed torpedoes and suicide craft, used by the Imperial Japanese Navy in the final stages of World War II.
Type 93 torpedo
…in collective work The Full Particulars of Secret Weapons (秘密兵器の全貌), first published by Koyo-sha, Japan, in 1952. A Type 93 torpedo modified into a Kaiten, Yasukuni Shrine Yūshūkan War Memorial Museum The Type 93 torpedo had a main chamber filled with pure compressed oxygen, a joint regulator valve…
A Kaiten, Type 1, at the Tokyo Yasukuni War Memorial Museum.
Kaiten Type 1 periscope at the Tokyo Yasukuni War Memorial
A Kaiten Type 1 being trial-launched from the light cruiser Kitakami
A Kaiten Type I at the Tokyo Yasukuni War Memorial Museum