As an envoy of the sixth seii taishogun (literally, "great general who subdues the barbarians") of Muromachi bakufu, Yoshinori ASHIKAGA, as well as of other feudal clans, such as the Shiba clan, Shibukawa clan, Otomo clan, and Shoni clan, he worked as the representative in trade with Korea, and in 1425 he was granted special privileges in trading (Tosho), which was the sign of trade permission with Korea, and was appointed as Jutoshonin (Japanese given Korean government evidence to be granted special privileges in trading).
室町幕府6代征夷大将軍足利義教や斯波氏・渋川氏・大友氏・少弐氏などの使節として朝鮮貿易を代行し、1425年（応永32年）には朝鮮から貿易を許す印である図書を与えられ、受図書人となった。