Ordnance九一式航空魚雷九一式航空魚雷九一式航空魚雷KindTorpedoCaliber450 mmService193119321933193419351936193719381939194019411942194319441945Japan · Pacific≈ 7 Dec 1941 – Oct 1944Japan · Southeast Asia≈ 10 Dec 1941 – Apr 1942Aircraft 3193119321933193419351936193719381939194019411942194319441945G4M1 Model 111,170≈ Jul 1941 – 1 Sep 1941≈ 8 Dec 1941 – Feb 1944≈ 8 Dec 1941 – 15 Feb 1942B5N27 Dec 1941 – 18 Aug 1945≈ Jan 1942 – 9 Apr 1942G4M2 Model 22429