Mezue ahịrịokwu na-esonụ: N'elekere 08:20 nke ụbọchị 30 nke ọnwa Ọgọstụ 1945, "I-400" malitere njem ya na "I-14" na "Proteus" na-aga Tokyo Bay, ebe ha kwụsịrị n'elekere 14:58 nke ụbọchị ahụ. Ọkọlọtọ United States nọ n'ụgbọ ya n'elekere ise nke ụtụtụ n'abalị iri atọ na otu n'ọnwa Ọgọstụ n'afọ 1945, n'elekere anọ nke mgbede, "I-400", "I-14", na "Proteus" bidoro ịkwaga n'ebe ọhụrụ ha ga-esi tụdo n'ime mmiri na-emebi mmiri n'ebe ụgbọ mmiri n'okpuru mmiri dị na Yokosuka, ebe "Proteus" tụtụrụ n'elekere ise nke mgbede. Submarines iri na abụọ nke US Navy ahọpụtara iji nọchite anya US Navy Submarine Force na
Emume ịtọgbọ ndị Japan n'Ọnụ Mmiri Tokyo bụkwa ebe ahụ, na "I-401" bịarutere na 31 Ọgọst. N'oge emume nnapụta na 2 Septemba 1945, onye isi, Submarine Force, U.S. Pacific Fleet (COMSUBPAC), Vice Admiral Charles A. Lockwood, nyere iwu ka ọkọlọtọ nke aka ya dị n'elu "I-400" na "I-401".