After Imperial Prince Kanenaga fell from power, there occurred an abnormal situation in which the shogunate government and the feudal lords in Kyushu traded with the Ming under the name of 'Ryokai, the king of Japan.'
懐良親王の勢力が駆逐された後は、幕府や九州の大名が「日本国王良懐」と称して対明貿易を行う変則状態が続く。