Talk:Jervis/@comment-30501447-20180317190652/@comment-2601:640:C600:8D60:9974:C093:4966:2F31-20180407055945

^ I wouldn't say IJN neglected ASW due to USN torpedo issues. They didn't know about that just as much as the USN themselves. Japan neglected ASW because that was not what their naval war plan against the US Navy really demanded.

The IJN concluded before WWII that a war with the US would be a lost cause if it was drawn out. Their plan was a decisive battle to crush the US Pacific Fleet and get the Americans to the bargaining table. This was a short term war plan, everything was geared towards it.

From the super-selective selection of IJN aviators for a highly trained, small corps of pilots. To their submarines absolutely, totally dedicated to attacking warships as sinking transports isn't important to a short war. To the total lacking of enough Destroyers, or cheaper Destroyer Escorts for better convoy escorting.

As you can see, ASW had zero bearing to what the IJN deemed was important to winning a short war, because a long one was a lost cause for them.