The So clan in Tsushima, who negotiated between Hideyoshi and the Joseon Dynasty, pursuing a peaceful settlement, required the Joseon Dynasty to send 'celebratory delegates' for the unification of Japan, instead of 'tributary delegates,' which Hideyoshi had required.
交渉に当たった対馬の宗氏は、これを何とか穏便に済まそうとして、秀吉が求める「朝貢使」の派遣を秀吉の全国統一の「祝賀使」の派遣に置き換えて要請した。