Overview
Chausuyama (Mount Chausu) rises to about 1,415 metres on the border between Aichi and Nagano Prefectures, and is celebrated as the highest peak in Aichi Prefecture. The mountain lies within Tenryū-Okumikawa Quasi-National Park, and its summit holds a triangulation marker and an observation deck offering sweeping views of the Okumikawa ranges and the distant Akaishi Mountains. The surrounding Chausuyama Highland is a year-round resort, popular for hiking and cool summer air, and for its winter ski slopes.
Highlights
- ●The highest peak in Aichi, about 1,415 metres tall
- ●A summit observation deck facing the Akaishi Mountains and Okumikawa ranges
- ●A border peak marked by a triangulation point
- ●Rich natural scenery within Tenryū-Okumikawa Quasi-National Park
History
Long regarded as a border peak dividing the old provinces of Shinshū and Mikawa, Chausuyama is counted among the 100 Famous Mountains of Shinshū and the 130 Mountains of Aichi Prefecture. As the tallest point in Aichi, the area was gradually developed into a highland resort valued for its cool climate, ski fields and panoramic outlooks. For the finer details of its development, it is best to consult official sources.
Access
The mountain stands near latitude 35.23 and longitude 137.66, straddling the Aichi–Nagano border. The Aichi-side gateway is the village of Toyone, while Neba serves the Nagano side, both reached by highland roads that wind through the mountains. Public transport is limited, so a private car or seasonal bus is the usual choice; check official sources for current road and service conditions.
Best season
From early summer through autumn the highland air is fresh and ideal for hiking, and the elevation keeps things cool even in midsummer. Winter draws visitors to the ski slopes and snowy vistas, while seasonal blooms such as moss phlox add colour in their season, giving the mountain a different face throughout the year.
Map
35.2275, 137.6556 · Wikidata
Suggested itinerary
- 1Enter from the highland gateway on the Toyone side and take in the mountain air
- 2Follow the walking trails toward the summit of Chausuyama
- 3Enjoy views of Okumikawa and the Akaishi Mountains from the observation deck
- 4Round off the visit with seasonal flowers and highland cuisine at Chausuyama Highland
Did you know?
💡 At around 1,415 metres, this is the highest point in all of Aichi Prefecture, letting visitors stand on the loftiest ground in the region. The second-order triangulation marker at the summit is inscribed with the name Chausuyama, and on clear days the observation deck reveals the Akaishi Mountains far to the east.
Nearby spots
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