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| IJN Kaiten 8.3 Tons 48' 5" x 3' 3" 1,550 kg warhead contact electric fuze  IJN November 7, 1944 |
Pilot Lt(jg) Nishina Sekio (KIA) Sunk November 20, 1944 Sub History Delivered to the Imperial Japanese Navy (IJN) as a Kaiten manned suicide torpedo based on the Type 93 torpedo. On November 6, 1944 at Otsujima Naval Base at Tokuyama Bay Japanese submarine I-47 embarked four Kaiten. This Kaiten was designated "Kaiten No. 1 (I-47)". On November 8, 1944 departs aboard I-47 as part of the "Kikusui Group" (Floating Chrysanthemum Group) bound for Ulithi Atoll. By November 19, 1944 both I-36 and I-47 reach the launch area at the entrance to Mugai Channel off the eastern entrance of Urushi Lagoon. Mission History On November 20, 1944 between 3:28am to 3:42am I-47 launched her four of her Kaiten including Kaiten No. 1 piloted by Lt(jg) Nishina Sekio co-inventor of the Kaiten who had aboard the ashes of the other co-creator, Lt. Hiroshi Kuroki who died in a training accident. Kaiten No. 2 piloted by Ensign Sato Akira, Kaiten No. 3 piloted Ensign Watanabe Kozo and Kaiten No. 4 pilot Lt(jg) Fukuda Hitoshi. Meanwhile, I-36 launched Kaiten No. 4 piloted by Ensign Taichi Imanichi. Her other three Kaiten are unable to launch due to malfunctions. At 5:45am one Kaiten hit USS Mississinewa (AO-59). It is generally believed to have been Kaiten No. 1 piloted by Lt(jg) Nishina Sekio. At 6:05am was a secondary explosion, presumably the detonation of 5" ammunition. Aboard a total of 63 crew (3 officers and 60 enlisted men) died in the attack, most in the forward compartments of the bridge and forward crew berthing area when it is consumed by flames. By 8:30am the fires were extinguished, but her bow dipped below the surface. References Combined Fleet - IJN Submarine I-47: Tabular Record of Movement Contribute
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