On August 20, 1844 he was born as the sixth son of Munehiro DATE (also called Chihiro DATE), a feudal retainer of the Kishu Domain, and his wife Masako (of the Atsumi clan).
1844年8月20日、紀州藩藩士伊達宗広（伊達千広とも）と政子（渥美氏）の六男として生まれる。