Nakanokuchi (中之口村, Nakanokuchi-mura) was a village located in Nishikanbara District, Niigata Prefecture, Japan.

On March 21, 2005, Nakanokuchi, along with the cities of Niitsu, Shirone and Toyosaka, the towns of Kameda, Kosudo and Yokogoshi (all from Nakakanbara District), the town of Nishikawa, and the villages of Ajikata, Iwamuro, Katahigashi and Tsukigata (all from Nishikanbara District), was merged into the expanded city of Niigata.

The village is the birthplace of Haguroyama Masaji (羽黒山 政司, November 18, 1914 - October 14, 1969) who was sumo's 36th yokozuna.

Haguroyama earned the rank in May 1941 and held the title for twelve years and three months.

In Nakanokuchi, there is a museum dedicated to Haguroyama and a bronze statue of the famous wrestler wearing his shimenawa (the knotted rope indicating his rank as yokozuna).