Mount Ariake

Mount Ariake is a 1,635 meter summit in the Jonen Mountains range that straddles the border between Azumino and Matsukawa. The peak features steep slopes covered in thick forest, creating a mountainous terrain typical of Nagano Prefecture.

The mountain has functioned as a natural boundary between different administrative areas of Nagano Prefecture since medieval times. This geographic role has persisted across centuries and continues to shape local administrative divisions.

Local communities gather annually at Mount Ariake's base for traditional ceremonies marking the arrival of spring when mountain trails become accessible.

Hiking trails to the summit start from both the Azumino and Matsukawa sides with clear markings throughout the route. Rest stops are positioned at regular intervals, making the climb manageable for most visitors.

The summit offers a natural vantage point where visitors can view two different valleys of Nagano Prefecture, allowing sunrise and sunset to be seen from contrasting angles. This geographic position makes it a favorite spot for photographers hoping to capture both light shows in a single visit.