He made an effort to suppress the wako (Japanese) pirates operating near Korea in compliance with a request by the Joseon king, receiving commendation and praise from the king for his success, and among other overtures, he even sent a messenger to the Joseon kingdom to express his hope that, because the Ouchi had a royal prince of Baekje as an ancestor, he be granted lands in Korea itself; all in all, Yoshihiro had forged a very strong relationship with the Joseon kingdom in Korea.
義弘は朝鮮の要請に従って倭寇の禁圧に努力して朝鮮国王から称賛されており、義弘は使者を朝鮮に送って祖先が百済皇子であることから、朝鮮国内の土地を賜ることを願うなど朝鮮との強いつながりを持っていた。