[Hartmann]

I think that U.S boats were a lot more aggressive against japanese destroyers compared with the germans.

Japanese destroyer losses were relatively heavy during the solomons campaign, and Allied intelligence was quick to appreciate that the Japanese were suffering from a serious destroyer shortage in early 1943. This prompted nimitz to issue an order on 13 April that destroyers be given higher target priority by submarines (second only to capital ships) in order to aggravate the Japanese destroyer shortage.