On the other hand, piracy occurred frequently in the Seto Inland Sea in the Johei era (in Japan) (in the 980s) ('Joheinankaizoku' [literally, pirates in the southern area in the Johei era]), and in 936, KI no Yoshito, who was appointed Tsuibu Nankai Doshi (the officer to capture criminals in the southern area), and FUJIWARA no Sumitomo, his subordinate, succeeded in convincing the pirates to submit themselves to surrender.
一方、西国では承平(日本)年間（930年代）に瀬戸内海で海賊行為が頻発し（「承平南海賊」）、936年（承平6）、追捕南海道使に任命された紀淑人とその配下の藤原純友らによる説得が功を奏し、海賊が投降した。