Kaibōkan (海防艦, "sea defense ship") or coastal defense ship refers to a type of naval ship used by the Imperial Japanese Navy during World War II for escort duty and coastal defense.
It's name Kai = sea, ocean, Bo = defense, Kan = ship, explains it's meaning that denotes it's role as a multi-purpose vessel. There initially intended for patrol and fishery protection, minesweeping and as convoy escorts.
They were Japanese equivalent to American destroyer escorts. Like their American counterparts, they were mass-produced during the war as a less expensive anti-submarine warfare alternative to fleet destroyers.
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