Tajima Province

Western Tajima (present-day Mita District) was under the control of the Futakata Kuni no miyatsuko, who claimed descent from the rulers of Izumo.

However, since the name "Tajima" appears in the Nihon Shoki, in an entry dated 675 AD, this division occurred before the formalization of the Japanese provinces.

This appears to correspond the Nyogamori site which has been excavated near the former Hidaka town hall, which is also part of Toyooka city.

[3] During the early Muromachi period, the Yamana clan were shugo of Tajima province and constructed Konosumiyama Castle as their stronghold.

The Yamana clan, formerly rulers of 11 provinces had been reduced in status the Battle of Sekigahara to a small hatamoto holding of 6700 koku in Shitsumi district.

However, the title was abolished only a few months later, and the Yamana served as imperial governors of "Muraoka Prefecture" until the abolition of the han system in 1871.

[4] Per the early Meiji period Kyudaka kyuryo Torishirabe-chō (旧高旧領取調帳), an official government assessment of the nation’s resources, the province had 620 villages with a total kokudaka of 144,312 koku.