His ancestors from a family of goshi, or village officer, status had served as (accounting) clerks in the local government of a fishing village (also a smuggling port of the domain of Omura) at the beginning of the Edo period, and were later promoted to accounting officer status.
その先祖は江戸時代初期に漁村(大村藩の密貿易の港兼用)代官所の手代(算盤方)として郷士格村役人の家より出仕、後に勘定方藩士として取り立てられた。