Mount Nijō (二上山, Nijōzan) is a mountain in the Kongō Range straddling the prefectural border between Taishi, Osaka and Katsuragi, Nara in Japan.

Mount Nijō is located along the Minami Osaka Line of the Kintetsu Railway and is accessible on several different hiking trails on all sides of varying difficulty and length.

[1] Mt Nijō was an active volcano millions of years ago.

As a result of the eruptions it distributed igneous rock, sanukite, tuff and emery powder.

There are a number of notable relics, temples and shrines located close by to Mount Nijo.