Kansuke YAMAMOTO, a strategist who served Shingen TAKEDA, was the younger brother of Sadamasa YAMAMOTOKAZUMA, the 11th generation descendant of Sadaoku and was an attendant of Mino no kami (Governor of Mino Province),Yorinari TOKI.
武田信玄の軍師山本勘助は、貞奥より11代末孫で美濃守土岐頼芸の近習であった山本数馬貞正の弟。