| Tadashige was the first son of Tadanori SAKAI, a hatamoto (direct retainer of the bakufu, which is a form of Japanese feudal government headed by a shogun) with 5000 koku from the Himeji Domain branch family, but became the main branch's foster child because the lord of Himeji Domain Tadateru SAKAI did not have any biological children. |
忠績は姫路藩分家旗本5000石の酒井忠誨の長男であるが、姫路藩藩主酒井忠顕に子がないため、本家の養子となる。 |