, also well known as Numa Castle, is the remains of a castle structure in Higashi-ku,

Okayama Prefecture is a Prefectures of Japan, prefecture of Japan located in the Chūgoku region of Honshu. Okayama Prefecture has a population of 1,826,059 (1 February 2025) and has a geographic area of 7,114 Square kilometre, km2 (2,746 sq mi). Okayama Prefecture ...

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

. Its ruins have been protected as an Okayama City Designated Historic Site. The castle was bulit by Nakayama Nobutada in the

Tenbun , also known as Tenmon, was a after '' Kyōroku'' and before '' Kōji''. This period spanned from July 1532 through October 1555. The reigning emperor was . Change of era * 1532 : At the request of Ashikaga Yoshiharu, the 12th ''shōgun'' of t ...

period (1532–1555). In 1559,

Ukita Naoie was a Japanese ''daimyō'' of the Sengoku period. He was born in Bizen Province, to Ukita Okiie, a local samurai leader and head of the Ukita clan. He has historical reputation as one of , a nickname which he shared with Matsunaga Hisahide a ...

killed Nakayama Nobumasa by order of

Uragami Munekage was a Japanese samurai and commander of the Sengoku period. The Urakami clan had been in a position of chief retainer of the Akamatsu clan. After the fall of the Akamatsu clan, Munekage gradually gained power and ruled Bizen, Mimasaka and par ...

. Then Naoie moved Ukita clan's main bastion from Shinjōyama castle. Naoie expanded his territory based in the castle. In 1570, Naoie started remodeling

Okayama castle is a Japanese castle in the city of Okayama in Okayama Prefecture in Japan. The main tower was completed in 1597, destroyed in 1945 and replicated in concrete in 1966. Two of the watch towers survived the bombing of 1945 and are now listed by ...

and moved from the castle in 1573. Soon after the

Honnō-ji Incident The was the assassination of Japanese daimyo Oda Nobunaga at Honnō-ji, a temple in Kyoto, on 21 June 1582 (2nd day of the sixth month, Tenshō 10). Nobunaga was on the verge of unifying the country, but died in the unexpected rebellion of ...

Hashiba Hideyoshi , otherwise known as and , was a Japanese samurai and ''daimyō'' (feudal lord) of the late Sengoku and Azuchi-Momoyama periods and regarded as the second "Great Unifier" of Japan.Richard Holmes, The World Atlas of Warfare: Military Innov ...

stopped and stayed in the castle on his way back to Kyoto to fight

Akechi Mitsuhide , first called Jūbei from his clan and later from his title, was a Japanese ''samurai'' general of the Sengoku period. Mitsuhide was originally a bodyguard of the last Ashikaga shogunate, Ashikaga ''shōgun'' Ashikaga Yoshiaki and later, one of ...

's army.

References

{{reflist Castles in Okayama Prefecture Historic Sites of Japan Former castles in Japan Ruined castles in Japan Ukita clan