A more concentrated deployment of Type 3 depth charge launchers, in order to counter the growing threat from enemy submarines. An impressive shipborne weapon for submarine suppression, able to throw 6-8 charges per side for an impressive total of 12-16 charges.<br>
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Equipped on the Hiburi-class's successors, the Ukuru-class, where they came into extensive use in convoys and anti-submarine patrols.