He was a son of Tosaku, the fifth son of Masayoshi MIYANAGA, the Yamamawari-yaku (a forestry official) of Shimokawasaki-mura (present-day Shimokawasaki, Oyabe City, Toyama Prefecture).
下川崎村(現在の富山県小矢部市下川崎)山廻役宮永正好の五男東作の子。