Dee ihe ga-aga n'ihu na paragraf a - "I-401" na "Segundo" rutere Sagami Bay n'ụsọ oké osimiri nke Honshu na 05:00 na 31 August 1945. E buliri ọkọlọtọ ndị America n'elu "I-401", Nambu nyekwara onye isi ndị isi ndị ọrụ ahụ ihe nrite abụọ "katana" dị ka ihe nnọchianya nke ịtọgbọ. Ka oge na-aga n'ụbọchị ahụ, ndị ọrụ ụgbọ mmiri ọhụrụ si na mmiri n'okpuru mmiri bịara n'ụgbọ "I-401" ma wepụ ndị ọrụ ụgbọ mmiri "Segundo", mgbe nke ahụ gasịrị, "I-401" gara Yokosuka ma jikọta ya na "I-14" nso "Proteus" na ụgbọ mmiri iri na abụọ nke US Navy ahọpụtara ka ha na-anọchite anya US Navy Submarine Force na emume ịtọgbọ ndị Japan
na Tokyo Bay. Na 08:00 na 1 Septemba 1945, a na-agbadata ọkọlọtọ agha nke Imperial Japanese Navy, na n'oge emume nraranye na 2 Septemba 1945, Onye isi, Submarine Force, US Pacific Fleet (COMSUBPAC), Vice Admiral Charles A. Lockwood, nyere iwu ka ọkọlọtọ nke aka ya dị n'elu "I-401".