Hiking & Trekking

Hike to Remote Akaishiyama and Spiritual Onuma Lake in Shiga Kogen

Hiking to the summit of Akaishiyama offers stunning views of the Northern Alps and surrounding mountains.


6 hours


June to October


Shiga Kogen, Nagano

Group size

2 to 10 persons




10,000 JPY


ダニエル ムーア Daniel Moore

ダニエル ムーア Daniel Moore

Unique Iga Plateau Mountain Activity Guide, ACTIVE TRAVEL JAPAN FARM Representative


Shiga Kogen, located in Nagano's Joshinetsu National Park, is known primarily as a Winter destination. Indeed, with some of the best powder snow in Japan and Jigokudani Snow Monkey Park nearby, it's easy to see why. However, Shiga Kogen is a great summer destination as well. Escape the heat at over 2,000 meters and take in the rugged mountainous scenery. Hiking to Akaishiyama and Lake Onuma will be an unforgettable experience in nature.

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Hosted by ダニエル ムーア Daniel Moore
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We meet at Yudanaka Station where we take the bus to Shiga Kogen's Onuma Ike Iriguchi Bus Station, a 45 minute drive. From here, we ascend the gently sloping gravel road 4 kilometers leading to Lake Onuma. We take some time to walk around, have a snack and say a prayer at the iconic Shinto Torii Gate on the lake's edge. From here, it's another 2 kilometers (1.5 hours) up the trail to Mt. Akaishi. On a clear day, we have stunning vistas of the Northern Alps and can even occasionally see Mt. Fuji. We also see Lake Onuma below. We have our packed lunch here and return to the bus station that takes us back to Yudanaka.


This experience targets a physically active, mid-high level hiker. Options are available to reduce distance or only hike to Lake Onuma, depending on the physical ability level of the group.


Please bring: Hiking shoes or boots Waterproof gear Hiking poles are recommended Hat, sunglasses, sunscreen Please also bring lunch and water (available for purchase near Yudanaka Station).


There are no restrooms or facilities after entering the trail.

Access info

Take the Nagano Dentetsu Line or the Snow Monkey Express bus from Nagano Station to Yudanaka Station.

Pick up


Nearest station

Yudanaka Station

Meeting place

Yudanaka Station

If you come by car

0 minutes