Mount Iizuna (飯縄山, Iizuna-yama), also written as 飯綱山 (Iizuna-yama), is a stratovolcano located ten kilometers north-northwest of the heart of Nagano, Nagano Prefecture, Japan.

[2][3] This mountain is a sacred site for mountain-based religious sects such as Shugendo, and said to be the home of a tengu named Saburō.

According to legend, there was once a strange, edible sand somewhere on the mountain, which the tengu would distribute in times of poor harvest.

[5] The South Trail (南登山道 Minami tozan do) begins at the Izuna Trailhead Bus Stop (飯縄登山口バス停 Izunatozanguchi basu tei), which is approximately 14 km from Nagano Station and can be reached by car or public bus run by Alpico Kōtsū.

The mountain is also a popular area for skiing and is where the bobsleigh and luge track for the 1998 Winter Olympics is located.

[7] The resort also hosted events during the 2005 Special Olympics World Winter Games.