Château de Chokuminejo, Japanese castle in Yasuzuka-ku, Joetsu, Niigata, Japan

Château de Chokuminejo is a Japanese mountain castle (yamajiro) on Mount Jōyama, a 344-metre peak in the Anzuka district of Jōetsu, Niigata Prefecture. It was built in the Nanboku-chō period, reportedly as the residence of Kazama Nobuaki of the Southern Court, and served as a branch castle of Kasugayama Castle during the Sengoku period. The site is a prefectural historic site, and the walk from the car park to the honmaru summit takes about 15 minutes.

Built possibly in the Nanboku-chō period, the castle is linked to Kazama Nobuaki of the Southern Court; it later passed to the Uesugi shugo. In 1507 Uesugi Fusayoshi stopped here while fleeing to Kantō before taking his own life at Tensui-go on August 7. Under Kenshin it served as a relay castle on the shortest route from Kasugayama to Mikuni Pass. In 1584 Higuchi Kanetoyo became castellan; the castle was abandoned in 1610 after Hori Tadatoshi was dispossessed.

The castle is also called Nōmine-jō or Naomine-jō, and a 1597 map of Kubiki District in Echigo, held by the Uesugi Museum in Yonezawa, labels it "Naomine no Jō". The Uesugi family's move to Aizu and Yonezawa left a town name, Naomine-chō, in Yonezawa. In 1907 a sword guard decorated with a warrior figure was found in a field on the castle's second enclosure; it was designated a city cultural property in 2007.

The site is reached by taxi, about 20 minutes from Mukogawa-Osugi Station on the Hokuhoku Line, or by car, 45 minutes from Joetsu or Kakizaki interchanges on the Hokuriku Expressway. A car park for 20 vehicles sits at the foot; the walk to the summit honmaru takes about 15 minutes. The site is closed by snow from December to late April.

In 1907 a sword guard decorated with a warrior figure was found in a field on the castle's second enclosure; it was designated a city cultural property in 2007. The castle appears as "Naomine-no-jo" on the 1597 Echigo Kubiki District map held by the Uesugi Museum in Yonezawa.