Rubuta ci gaba don wannan sakin layi - A 08:20 a ranar 30 ga Agusta, 1945, "I-400" ya fara aiki tare da "I-14" da "Proteus" da ke zuwa Tokyo Bay, inda suka yi ruwa a 14:58 a wannan rana. An dauke tutar Amurka a cikin jirgin a karfe 05:00 na ranar 31 ga Agusta, 1945, kuma a karfe 14:45 "I-400", "I-14", da "Proteus" sun fara motsawa zuwa wani sabon wuri a cikin ruwa a tashar jirgin ruwa a Yokosuka, inda "Proteus" ya yi ruwa a karfe 16:50. Jirgin ruwa goma sha biyu na Amurka da aka zaɓa don wakiltar Sojojin Ruwa na Amurka a bikin mika wuya na Japan
a Tokyo Bay kuma an yi ruwa a can, kuma "I-401" ya isa ranar 31 ga watan Agusta. A lokacin bikin mika wuya a ranar 2 ga Satumba, 1945, Kwamandan, Sojan Ruwa na Sojan Ruwa, Amurka Pacific Fleet (COMSUBPAC), Mataimakin Admiral Charles A. Lockwood, ya ba da umarnin a yi masa alama a kan jirgin "I-400" da "I-401".