[1] Mitake Castle is located at the top of a 400-meter hill northeast of the Iinoya valley in former Tōtōmi Province, overlooking Lake Hamana to the south and the modern city of Hamamatsu in the distance.

There is a secondary enclosure on the eastern ridge of the mountain, measuring 200 meters, which may have been used as an encampment, although it has no clear defenses, other than a dry moat at one end.

The presence of a Shinto shrine also commemorates that this was the location of the palace of Prince Muneyoshi during his brief stay at the castle during the Nanboku-chō period.

Prince Muneyoshi, the son of Emperor Go-Daigo, initially rallied his forces from Iinoya valley, around which time Mitake Castle was built.

[2] In 1590, when Toyotomi Hideyoshi transferred Tokugawa Ieyasu to the Kantō region, the Ii clan accompanied him to his new domains, and Mitake Castle was abandoned around this time.