Emperor Kōkaku
Narimura was the second son of Date Shigemura by a concubine. His childhood name was Shikisaburo (式三郎) later Shojiro (総次郎) later become Date Tokimura, and he became heir on the death of his elder brother in 1783. At the time of his "genpuku" ceremony in 1787, he received a "kanji" from "Shōgun" Tokugawa Ienari and became Date Narimura. He also received court rank of Junior Fourth, Lower Grade and the courtesy titles of "Mimasaka-no-kami" and "Jijū" (chamberlain) at that time. In 1790, he became "daimyō" on the retirement of his father, and his title was changed to "Mutsu-no-kami" and "Sakonoe-shōshō". In 1793, he married the daughter of the "kampaku" Takatsukasa Sukehira, who was the elder sister of Emperor Kōkaku.