Mount Iimori, Mountain peak in Daitō and Shijōnawate, Japan.

Mount Iimori is a 314-meter (1,030 ft) peak located within the Kongō-Ikoma-Kisen Quasi-National Park in Osaka Prefecture. Multiple hiking trails wind through the area, connecting different starting points and offering varied routes for visitors to explore.

The summit holds the ruins of Iimoriyama Castle, built by Miyoshi Nagayoshi in the 16th century; its kuruwa terraces remain visible. The mountain was also the site of the 1348 Battle of Shijōnawate between Kusunoki Masatsura and Kō no Moronao. A bronze statue of Kusunoki Masatsura, erected in 1938, faces toward Yoshino.

The summit holds a bronze statue of Kusunoki Masatsura, erected in 1938, facing toward Mount Yoshino. Masatsura fought and died at the Battle of Shijōnawate here in 1348 against Kō no Moronao. The mountain also appears on the Osaka Midori no Hyakusen list of natural areas.

The mountain is accessible from both the Daitō side and from Shijōnawate, with several entry points available for hikers. Trails are passable year-round, though visitors should be ready for seasonal changes in weather and ground conditions.

The summit, at 314.3 m, lies entirely within Daitō; the mountain straddles the Daitō–Shijōnawate line, but the peak itself does not sit on it. Just south of the top along the ridge stands a transmission tower for FM Osaka, broadcasting across Osaka Prefecture and parts of eight neighbouring prefectures.