Type: Mountain castle.
Built in: 1524 by Yamada clan.
Class: Ruins.

Arato castle was built by Yamada clan who are samurai of Murakami clan about 400 years ago.
Murakami clan was the ruler of the land during Muromachi period. He defeated Takeda Shingen many times, but finally Takeda Shingen conquered this area and abandoned Murakami clan. After the battles of Kawanakajima, Uesugi Kenshin took over this castle but the castle lord Yashiro betrayed Kenshi. Later, Kenshin defeated this castle and Arato Castle was abandoned.

The gates, houses and keeps are restored.