I-370 Type D1 submarine by Takeshi Yuki via Combined Fleet
I-370 Type D1 submarine by Takeshi Yuki via Combined Fleet. The 18 planned Type D submarines, 241-foot/2,200-ton boats could carry five Kaiten manned torpedoes of the Shinchō Tokubetsu Kōgekitai topside and carry 85-100 tons of freight or gasoline to blockaded far-flung outposts. Only 13 were completed 1944-45 and nine of those subsequently lost during the war. I-373 was the only one completed as a tanker.