Although Hideyoshi TOYOTOMI, who recognized the way the Matsui family worked, made an offer Yasuyuki a position of Daimyo (feudal lord) of a half of Iwami Province with 180,000 Goku crop yields, Yasuyuki declined the offer due to his wish to continue to serve the Hosokawa family.
松井一族の働きぶりをみた豊臣秀吉は康之を石見国半国18万石の大名にとりたてると申し出たが、康之はこのまま細川家に仕えることを希望し辞退した。