Hachioji Castle was located in present Moto-Hachioji-cho, Hachioji City, Tokyo. The castle is selected as one of Japan’s 100 Fine by Castles and its ruins are designated as a National Historic Site. It is said that the castle was built in the era between 1584 and 1587 by Hojo Ujiteru, the second son of Hojo Ujiyasu, who was the 3rd lord of Odawara Castle. In 1590, the castle was attacked by Toyotomi Hideyoshi’s troops with 15,000 soldiers as a part of his national unification campaigns. Though it was one of the largest fort castles in the Kanto region at the time, the castle fell in only one day and was dismantled.

At present, the ruins of Goshuden (the castellan’s residence), attached compounds and stone walls remain in Mt. Fukazawayama (Presently called Shiroyama) with an altitude of 445 m. After the elapse of 400 years, the ruins have been restored to its original forms and the site is open to public since 1990.

Down the slopes in the mountain are some historic sites pertaining to the castle such as the Goshuden-no-taki Waterfall, where Ujiteru’s wife and her maids threw themselves into the water and committed suicide at the attack by Hideyoshi’s troops, the grave yard of Hojo Ujiteru and his retainers, and Ujiteru’s family temple, Sokanji Temple.