4th Torpedo Attack Unit
Carrier: Hiryu
First Wave, First Group, Commander: Lieutenant Hirata Matsumura
1st Division; Commander: Lieutenant Hirata Matsumura (Unit Commander)
4 Kates. Mission: West Virginia and Oklahoma
2nd Division; Commander: Lieutenant Hiruharo Kadono
4 Kates. Mission: Helena
See also: Hiryu; West Virginia; Oklahoma; Helena