Dee ihe na-esote paragraf a - Na 7 Disemba 1941, "I-122" tọgbọrọ ogbunigwe iri anọ na abụọ Type 88 Mark 1 n'ebe ugwu ọwụwa anyanwụ Singapore, wee were ebe nche ya n'akụkụ ọwụwa anyanwụ nke Strait Johore tinyere "I-121". N'Ebe Ọwụwa Anyanwụ Eshia, Agha Ụwa nke Abụọ malitere na 8 Disemba 1941, ndị agha Japan wakporo
British Malaya dị n'ebe ugwu Singapore ụbọchị ahụ. E kenyeghachiri ya na Southern Submarine Force na 12 Disemba 1941, ọ gara na Cam Ranh Bay na French Indochina nke ndị Japan na-achị na 14 Disemba 1941. Na 18 Disemba 1941, ọ laghachiri n'ụzọ iji kwado mwakpo ndị Japan na Philippines, na-aga na nso Davao na Mindanao na ụlọ ọrụ "I-124". E kenyere ya na Submarine Group "A" tinyere "I-121", "I-123", na "I-124" na 26 Disemba 1941, o mechiri ngagharị ya na 31 Disemba 1941 mgbe ya na "I-124" bịarutere na Davao ọhụrụ e jidere ebe "Chōgei" kwadoro "I-121", "I-122", na "I-124".