The Kahei family began to claim to be the head family of the school at around the end of the Edo period, but this family eventually became extinct when Kahei HIRAIWA the eighth passed away in 1892.
江戸末期ごろには加兵衛家が宗家を名乗るようになったが、1892年に八世平岩加兵衛が没して廃絶した。