Operation Tatsumaki


This was the Japanese submarine component of the ‘Yu’ plan to decimate the US Fast Carrier Task Force in the lagoon of Majuro atoll in the Marshall islands group (May 1944).

The submarines at the centre of this part of the plan’s components were I-36, I-38, I-41, I-44 and I-53, each carrying two Type 4 ‘Ka-Tsu’ amphibious carrier vehicles on its after deck. The Type 4 was equipped to carry and launch 450-mm (17.7-in) Type 2 surface-launched torpedoes. On 26 March 1944, I-36 left Kure for a preliminary reconnaissance of Majuro, and this was undertaken on 22 April, the submarine’s Yokosuka E14Y1 ‘Glen’ floatplane reporting the presence of 11 carriers and three battleships.

'Tatsumaki' fell into abeyance with the demise of the 'Yu' plan.