Tuhia he haere tonu mō tēnei wāhanga - I te 08:20 i te 30 o Akuhata 1945, ka rere a "I-400" i te taha o "I-14" me "Proteus" e haere ana ki Tokyo Bay, i reira i whakatū ai rātou i te 14:58 o taua rā anō. I whakaarahia te haki o te United States i runga i a ia i te 05:00 i te 31 o Akuhata 1945, ana i te 14:45 "I-400", "I-14", me te "Proteus" i tiimata te neke ki tetahi waahi hou i roto i te pakaru wai i te turanga kaipuke moana i Yokosuka, i reira te "Proteus" i whakatakotoria i te 16:50. Tekau ma rua nga kaipuke kaipuke o te US Navy i tohua hei tohu mo te US Navy Submarine Force i te huihuinga o te tuku a Japan
I tae atu hoki a I-401 i te 31 o Akuhata. I te wa o te huihuinga tuku i te 2 o Hepetema 1945, ko te Kaiwhakahaere, Submarine Force, U.S. Pacific Fleet (COMSUBPAC), Vice Admiral Charles A. Lockwood, i whakahau i tana haki whaiaro i runga i te "I-400" me te "I-401".