How the commanding officer of Destroyer, Submarine, and Torpedo squads are called

16th Destroyer Division (at the break of the war, Kuroshio is moved to 15th division)

Group of battleship and cruisers: Battleship Division (Sentai)

Group of aircraft carriers and seaplane tenders: Carrier Division (Koukuu Sentai)

Group of light cruiser and several destroyer division: Torpedo Squad (Suirai Sentai)

Group of submarines and submarine tenders: Submarine Division (Sensui Sentai)

Commander

1st Carrier Division

18th Battle Division (Cruiser Division 18)

2nd Torpedo Division (Destroyer Squadron 2)

At the break of the war, consisted of Jintsuu and the 8th, 15th, 16th and 18th Destroyer Division

Combined Fleet

By the way, the ship where the commander holds command is called the flagship

Fleet, Carrier Fleet, Area Fleet, Combined Fleet

Commander

Commander

Commander

Oh my

Commander-in-Chief