Tanaka Domain
Nishio Tadanari was the eldest son of Nishio Tadaakira, daimyō of Tanaka Domain in Suruga Province. However, as Tadaakira died in 1654, Tadanari succeeded to the Nishio clan leadership as an infant. Tanaka Domain's revenues under the Nishio had been 25,000 "koku"; but since Tadanari's uncle Nishio Tadatomo was granted 5000 "koku" of territory, the domain's income was reduced to 20,000 "koku". In 1661 the young Tadanari was received by "shōgun" Tokugawa Ietsuna, and given the courtesy title of "Oki no kami" and junior 5th court rank, lower grade. Tanaka Domain reverted to 25,000 "koku" status upon Nishio Tadatomo's death in 1675; however, soon afterward, in 1679, the Nishio clan was relocated to Komoro Domain in Shinano Province. Tadanari made great efforts to fix the damage caused by the misgovernment of Sakai Tadayoshi, the previous lord of Komoro; however, he was transferred once more (after barely three years in Shinano) to Yokosuka Domain.