is a quaternary stratovolcano and one of Japan's 100 famous mountains. Its summit is . The summit consists of Mount Shari, and the western ridge. It is located on Hokkaido's Shiretoko Peninsula on the border of Shari and Kiyosato in Shari District, Okhotsk and Shibetsu in Shibetsu District, Nemuro.
Its former name in the Ainu language was Onnenupuri. The name Shari in Ainu means marshes where reeds are growing. It is also known by the names or .
The mountain is made mainly of andesite, dacite, and basalt.
The most popular ascent route starts from the Kiyosato side. A public bus (Sharibus) runs three times a day (first at 6:30) from Shiretokoshari Station to the start of the trail.