As his father, Yoshihiro, who was an heir of the first lord Yoritoki KANAMORI, died young at age 37, Yorikane as a legitimate grandchild took over as head of the family when his grandfather died.
父の可寛は初代藩主金森頼時の世子であったが、37歳の若さで早世したため、享保21年（1736年）の祖父の死去により嫡孫ということで家督を継いだ。