The Kamakura bakufu (Japanese feudal government headed by a shogun), which took hard-line measures in the negotiation after the war, such as killing of the envoys, started full-fledged guard against foreign countries.
戦後の交渉も使者を殺害するなど強攻策で望んだ鎌倉幕府は本格的な異国警護に着手した。