Thereafter, So MIN was appointed to important positions, lecturing on eki (such as shueki, which was an eki established during the Zhou Dynasty) to the pro-Baekje SOGA no Iruka, a funeral servant called FUJIWARA no Kamatari and others (according to a book called Taishokukanden).
その後は重用され、親百済派である蘇我入鹿や祭官家の藤原鎌足らに易（周易）を講じた（大織冠伝）。