Torpedo wz. 93 (Japanese 93-shiki gyorai) is a Japanese torpedo of World War II. The first prototypes of this torpedo were built at the turn of the 1920s and 1930s, and the torpedo entered service with the Japanese fleet in 1933. In the basic version, the length of the torpedo was 900 cm with a diameter of 610 mm. The equipped mass was 2700 kg, and the warhead weight - up to 490 kg. The maximum speed did not exceed 50-52 knots, and the effective range for such a speed was as much as 20,000 meters! Torpedo wz. 93, commonly known as the Long Lance, was designed by two Japanese naval officers: Vice Admiral Kaneji Kishimoto and Captain Toshihide Asakuma. Research and development work continued in 1928-1933. Ultimately, however, the largest, fastest, and most effective torpedo of World War II was created. This weapon became the main torpedo armament of Japanese destroyers and cruisers during the Pacific War, contributing significantly to the numerous successes of the Japanese fleet in 1941-1942. Work was also carried out on a modernized version of the torpedo (wz.93 model 2) with an increased maximum speed, but it did not enter serial production. However, in 1943, the wz.93 model 3 torpedo was put into production with a reduced firing range, but a larger warhead.
