The remains of Miharu Castle stand on Mt Ooshida near the town of Miharu in Tamura-gun, Fukushima Prefecture. The castle was established by Lord Yoshiaki Tamura of the Tamura clan and constructed from the Kamakura period to the Nanboku-chou period.

The Tamura clan eventually became one of the servant clans to a larger more powerful clan, but in 1590, after the Ouu-shioki, they changed to serve the Masamune Date and moved to Sendai. Soon after, the castle became the property of clan lords such as Ujisato Gamou, Kagekatsu Uesugi and Yoshiaki Katou.

In 1645, Toshitsue Akita became the castle lord for 10 thousand cubic meters of rice, and the Akita clan ruled until the Meiji Restoration. The castle was abandoned in the 4th year of the Meiji period (1871) due to the abolition of the domain system.

Today, the castle site is famous for its beautiful cherry blossoms. Many public institutions stand near the castle remains, and the area functions as a center of the town of Miharu. Miharu Castle reveals the sorrows and weaknesses of those who were pawns in the inevitable flow of history.