But in the case that the 3rd Nobuharu HOSHO did not have his successor, Renzaburo 豊羨, the third son of Kanze-ryu kotsuzumi-kata 豊綿 KANZE, the 13th was adopted into the family.
ただし三世・宝生信春が後嗣を欠いたときには、観世流小鼓方十三世観世豊綿の三男錬三郎豊羨が養子入する。