Impressed with Yasuyuki's work, Hideyoshi TOYOTOMI tried to headhunt offering a half of Iwami Province and rice stipend 180,000 koku (32470.2 cubic meters), however, Yasuyuki declined it and kept serving the Hosokawa clan.
康之の働きぶりをみた豊臣秀吉は石見国半国18万石を与えると申し出たが、康之は細川家に仕えることを希望して辞退した。