Nyora kupfuurira kweiyi ndima - Musi waApril 20, 1945, "I-121" uye "I-122" zvakadzoserwa kuDhipatimendi rePasi pegungwa 33 muKure Submarine Squadron. "I-121" yakaendeswa kuMaizuru Naval Base musi wa12 Chikumi 1945 uye yakagara imomo kusvika pakupera kweHondo Yenyika II. Kurwisana kwakaguma musi wa15 August 1945, uye Japan yakapa chiokomuhomwe zviri pamutemo
musi waSeptember 2, 1945. "I-121" yakazvipira kuvaAllies muna September 1945 paMaizuru.