Board Thread:Event Community Discussion/@comment-25730832-20170511175819/@comment-26574811-20170513024437

Hyper Shinchan wrote: Tsubakura wrote: A correction, kaibokan were multipurpose ships, since the beginning they were supposed to be used as fisheries patrols in peacetime, minesweepers and escorts in wartime. Japan didn't place any emphasis whatsoever on escorts, they didn't even consider to convoy their merchant traffic, hence they didn't specifically build ships for this purpose.
 * The Kaiboukan were built with the purpose of settling fishing disputes between USSR and Japan, not for use as an escort in war.

I think we may need to distinguish Shimushu (Pre-war Kaiboukan) and Etorofu (mid-war Kaiboukan). Shimushu was never designed to be escorts, but she was used as such later; Etorofu, on the other hand, was designed with escort duty in mind.