is a 2,603m mountain on the border of Chino and Koumi of Nagano in Japan. This mountain belongs to Northern Yatsugatake Volcanic Group.
Mount Neishi is a stratovolcano. This mountain is a part of the Yatsugatake-Chà «shin Kà Âgen Quasi-National Park. , , lies to the north, along the main traverse route of the Yatsugatake Mountain Range, and Mount Nishi Tengu, , is to the northwest. There is trail from to , through Mount Higashi Tengu, to Mount Neishi. Additionally, there is a trail heading east to , on the pass between Mount Higashi Tengu and Mount Neishi.
, , , , and Mount IÃ Â, are located to the south. A lodge, , is located on the south side, 15 minutes from the peak.. The lodge is open April to November. The main traverse route of the Yatsugatake Mountain Range passes through the summit of Mount Neishi.