, also well known as Numa Castle, is the remains of a castle structure in Higashi-ku, Okayama Prefecture, Japan. Its ruins have been protected as an Okayama City Designated Historic Site.
The castle was built by Nakayama Nobutada in the Tenbun period (1532âÂÂ1555). In 1559, Ukita Naoie killed Nakayama Nobumasa by order of Uragami Munekage. Then Naoie moved Ukita clan's main bastion from Shinjà Âyama castle. Naoie expanded his territory based in the castle. In 1570, Naoie started remodeling Okayama castle and moved from the castle in 1573.
Soon after the Honnà Â-ji Incident, Hashiba Hideyoshi stopped and stayed in the castle on his way back to Kyoto to fight Akechi Mitsuhide's army.