Type: Hilltop castle.
Built in: Muromachi period.
Class: Ruins

Komoro Castle, a.k.a Kaikoen, is a hilltop castle located in Komoro, Nagano prefecture. It is very unique castle because it is built at the bottom of a valley, its castle town is located upper position which is very rare.

Komoro castle was built by Yamamoto Kansuke when Shingen conquered this area during 16th century. In Edo period, Sengoku Hidehisa became the castle lord of Komoro, and he constructed Otemon Gate and current structures. Otemon is still remains after though many years. Also, dry moats, stone walls and Sannomon gate are preserved in original condition.

-Otemon Gate-
Constructed in early 17th century. Registered as the important historical asset.

-Sannomon Gate-
Constructed in 1765. Registered as the important historical asset.

-Mirror Stone of Yamamoto Kansuke-