When is the best time to see the moss phlox flowers?

Mid-May to early June during the Shibazakura Festival. The phlox bloom in six colors including pink, white, sky blue, and lilac on Mt. Hagitaro's slopes.

How long does it take to hike to the summit?

Approximately 30 minutes from the Information Center or 20 minutes via the eastern route on well-maintained trails. The summit features a 360-degree observation platform.

What activities are available besides hiking?

Go-karting, mountain biking, canoeing, fish-catching in warmer months, and skiing, snowboarding, and sledding in winter. Night activities include illuminated phlox gardens and stargazing.

Can I visit Mt. Chausuyama in winter?

Yes. The area operates Aichi Prefecture's only ski resort with skiing, snowboarding, and sledding facilities. Conveyor belt walkways provide easy access to slopes.

What is unique about autumn at Mt. Chausuyama?

The highlands are where Aichi Prefecture's autumn foliage appears first each year. Seasonal colors reflect in quiet mountain pools throughout the area.

Nagano

Mt. Chausuyama

4.1 (233)Mountain PeakNatural FeatureEstablishment

Last updated May 17, 2026

Mt. Chausuyama is a mountain located on the border between Aichi and Nagano Prefectures, with its highest point at 1,415.2 meters on the Aichi side, making it the tallest peak in Aichi Prefecture. The mountain lies within the Tenryu-Okumikawa Quasi-National Park and features the Chausuyama Highlands, which extend between Mt. Chausuyama and Mt. Hagitaro (1,358 meters) to the southwest. The area developed as a year-round outdoor recreation destination combining natural alpine scenery with seasonal activities.

The highlands hold natural significance for their diverse seasonal landscapes including white birch forests, grasslands, and alpine flora. The area is home to Japan's highest moss phlox field, with approximately 400,000 phlox plants covering a 22,000-square-meter site on Mt. Hagitaro's slopes. These flowers bloom in six colors including pink, white, sky blue, and lilac from mid-May to early June during the Shibazakura Festival. The highlands mark where Aichi Prefecture's autumn foliage appears first, with seasonal colors reflecting in quiet mountain pools. The summit offers panoramic views of the Southern Japanese Alps.

Visitors can hike well-maintained trails to the summit, taking approximately 30 minutes from the Information Center or 20 minutes via the eastern route. The mountain supports hiking from spring through fall with different seasonal experiences including phlox viewing, summer greenery, and autumn colors. Activities include go-karting, mountain biking, canoeing, and fish-catching during warmer months. The area hosts Aichi Prefecture's only ski resort during winter, offering skiing, snowboarding, and sledding with conveyor belt walkways for easy access. Night activities include illuminated phlox gardens and stargazing opportunities.

Mt. Chausuyama is located in Toyone Village, approximately 1 hour and 20 minutes by car from the Shin-Tomei Expressway Shinshiro Interchange. The mountain has no nearby train stations, making car access the primary transportation method. Admission to hiking trails is free, though the ski resort, seasonal festivals, and activity facilities charge separate fees.

Overview

Address

Chausuyama, Neba, Shimoina District, Nagano 395-0701, Japan

Frequently Asked Questions

Traveler reviews

11th May 2026. Not fully bloomed yet. But the view is nice from the top. Give it another 2 weeks if you planned on going for the flowers.

Nghi Tram

May 10, 2026

A wonderful place , especially for children who like to drive small cars for children . ¥500 .

The highest mountain east of Nagoya, located at the border of Aichi and Nagano prefectures. Even though it is not so high and there is an only very small ski resort, the specialized constructed driving way to the top is very much breathtaking with so much very Japanese great nature in the mountains. Located at the edge of northeastern Aichi and southwestern Nagano, very close to the border with Shizuoka prefecture also. Driving car or with tourist group from Nagoya, recommended tourism course is, through the Sanage Green Road which is very new and comfortable ETC highway, and after the very end directly run national route 153 which is very much natural Japanese countryside route with lots of nature alongside, through southern Nagano till Chuo expressway at Sonohara or Iida Yamamoto. Recommended visiting or driving route is from Nagoya, see and experience some tourism spots like Toyota automobile museum or IKEA Nagakute east of Nagoya, see the beautiful tiny rounded river Kanpachikyo which is very close from the end of the Sanage Green Road. Around Asuke area can see red and brown or sometimes even gold coloured very much special maple trees at Korankei in autumn, can try to taste local traditional snacks like Goheimochi or grilled solty or Japanese miso flavored river fishes or can find any kind of very traditional souvenirs at Korankei, then you can find lots of onsen around Inabu and southern Nagano, onsen means very traditional Japanese hotsprings which every foreigner can experience only in Japan. There are some nice affordable hotels as well. Very Japanese countryside natures. By the way here is the border of both Aichi and Nagano and the address of this place should be Nagano prefecture I guess.

Nice

I climbed this mountain, which is the highest peak in Aichi Prefecture. It's not a particularly high mountain, so I was able to enjoy a relaxing hike. Since it was the autumn foliage season, I was able to enjoy some really great views from the viewpoints.