Nope,It's actually the Sen-Toku class, I-400 was the first.. of the group I-401, and I-402.
Heres what happened to I-401 same fate of the 400..I pulled the wrong ship and date
31 May 1946:
The I-401 is a target ship in the Pacific off Pearl Harbor for tests of the Mark 10-3 exploder. At 1059, she sinks by the stern at 21-12N, 158-07W after being hit by two Mark-18 electric torpedoes fired by Cdr O. R. Cole's USS CABEZON (SS-334).
And a clip from one of my books....
Unfortunately for Japan, the war situation deteriorated so rapidly that these boats were never allowed to show what they could do. On 26 July 1945, I-400 and I-401 set out on a combat mission to launch their aircraft in Kamikaze attacks on the American fleet anchorage at Ulithi. In coordination with a Kaiten attack, they were scheduled to launch early on 17 August, but by then hostilities had ceased. Both boats therefore returned to Japan and were surrendered to the Allies. After the war, these two were taken to the United States, examined, and finally scuttled in the Pacific in 1946. I-402 was converted to carry precious fuel to Japan from the East Indies, but never performed such a mission. She was scuttled off Goto Island in 1946. Construction of two further boats of this design, I-404 and I-405, was stopped before completion, although I-404 was 90% complete. A further 13 boats were canceled before construction started.
