Which navy most needed a Black Swan-type escort?

Which navy would benefit most from a class like the Royal Navy's Black Swans?

The Japanese navy, in the context of its shortage of escorts.

Japan is the immediate choice when asked which navy would benefit most from a class like the Royal Navy's Black Swans. The question follows a debate over the threat Japanese escorts posed to submarines attempting surface gun attacks. Too few escorts having been built is the explanation offered in reply to a claim that escort work was considered dishonorable. The recommendation remains brief, without specifications for an alternative Japanese escort design.