Tuhia he haere tonu mō tēnei wāhanga - "I-401" me "Segundo" i tae ki Sagami Bay i te takutai o Honshu i te 05:00 i te 31 o Akuhata 1945. I whakaarahia te haki o Amerika i runga i te "I-401", a ka whakawhiwhia e Nambu ki te rangatira rangatira o te roopu taonga e rua "katana" hei tohu o te tuku. I muri mai i te ra, ka tae mai he roopu utu hou mai i te tono kaipuke moana ki runga i te "I-401" ka whakawatea i te roopu utu "Segundo", i muri mai ka haere te "I-401" ki Yokosuka ka herea me te "I-14" e tata ana ki te "Proteus" me te tekau ma rua nga kaipuke moana a te US Navy i kowhiria hei tohu mo te US Navy Submarine Force i te huihuinga tuku a Japan
i te Moana o Tokyo. I te 08:00 i te 1 o Hepetema 1945, i whakaititia te haki whawhai a Imperial Japanese Navy, ana i te wa o te huihuinga tuku i te 2 o Hepetema 1945, ko te Kaihauturu, Te Mana Submarine, US Pacific Fleet (COMSUBPAC), Vice Admiral Charles A. Lockwood, i whakahau i tana haki whaiaro i runga i te "I-401".