Then, Yoshimitsu became a priest, and then sent a merchant called Koitsumi from Hakata City and the priest Soa as missionaries to Ming in 1401, with the aristocratic title of "Junsangu of Japan, Michiyoshi MINAMOTO," instead of using the higher (but samurai) title of "Taisei Shogun."
そこで義満は出家し、太政大臣も辞した「日本国准三后源道義」の名義で1401年（応永8年）に博多の商人肥富と僧祖阿を使節として明に派遣する。