Mount Sannosawa (三ノ沢岳, Sannosawa-dake) is amongst the Kiso Mountains, located in the Kiso District, Nagano Prefecture, in the Chūbu region of Japan. It is 2,846 m (9,337 ft) tall. It is composed of Granite, and has a 120 m (394 ft) long 30 m (98 ft) wide cirque covered in dense vegetation, mainly pine trees. There is the "Sannosawa cirque". Glacial expansion has created a gully, just underneath the cirque. A lot of Alpine plant grow naturally. Name River and Ina River (Tributary of Kiso River) that become the sources flow to the Ise Bay of Pacific Ocean. There is the tributary called "Sannosawa" around Mount Sannosawa.