[MasterGunner01]

Unlike the Allied response to the Battle of the Atlantic where all sorts of technology was arrayed against the U-boats: long range patrol bombers (seaplane and land based); blimps for convoy escort; hunter-killer groups of “Jeep” carriers and destroyer escorts; convoys; HF direction finding; state of the art radar and sonar; improved ASW weapons like homing torpedoes, Hedge Hogs, and redesigned depth charges - Japan never got its ASW act together at any time during the Pacific War. Japanese radar and sonar sucked; the IJN had no equivalents to the CVE/De hunter-killer groups; Japan did not have the types and numbers of long range ASW aircraft. Their ASW efforts can best be described as amateurish.

[central_va]

Ironic since their basic destroyer design was the best of all belligerents. If they had taken sonar/radar seriously from the beginning the war would have been much more difficult for us. The very last sets they were making were almost as good as ours but that was in 1945!