After Narisada, his adopted son Nariharu MAKINO became head of the Makino family and his eldest son (Narinaka MAKINO) continued the family line however, because Narinaka died early (age 21) Sadamichi was called upon to inherit the role of family head.
牧野家家督は成貞の後、養子の牧野成春、その長男・牧野成央が継いでいたが、成央が21歳で早世したため、後を継ぐこととなった。