About Gujo-Hachiman Castle in Japanese. Gujo-Hachiman Castle was first built in 1555 by Lord Endo Morikazu as his base when he was battling another feudal lord, Tono Tsuneyoshi, for the control of the Gujo domain.

Morikazu's son Yoshitaka then unified the Gujo domain and built the castle and castle town.

The succeeding lord, Inaba Sadamichi, built the castle main tower. The castle later had other samurai clans as occupants such as the Endo, Inoue, and Kanamori Clans.