Since Mikizo succeeded his father, he is often considered to be 'an elder brother of Kuwajiro'; however, according to the register of deaths and Hikogoro SATO's diary (published by Hino City), he was actually a younger brother of Kuwajiro.
大石家の家督を継いでいたためか一般に「鍬次郎の兄」とされることも多いが、過去帳や佐藤彦五郎日記(日野市発行)によると弟が正しい。