U.S. Naval Institute on X: "#OTD in 2001, the Japanese Coast Guard engaged in a firefight and sank an armed North Korean infiltration ship disguised as a fishing trawler that had entered Japanese waters. The "Battle of Amami-Oshima" marked the first time that Japanese forces sank a hostile ship since WWII. https://t.co/KKQ1CpDHAF" / X