Hisatoki had genpuku (celebrate one's coming of age) by Yoshihisa SHIMAZU's kakan (put a crown on a young man's head on a genpuku ceremony), and later became the chief retainer after achieving many military exploits by following Yoshihisa.
久時は島津義久の加冠により元服、後に義久に従い数々の軍功を得て家老となった。