Location and surroundings
Following the range hierarchy from the widest to the narrowest, Aka-dake is located in East Asia, within the Japanese Archipelago on the island of Honshu, specifically anchored in the Yatsugatake Mountains. The mountain sits directly on the border between Chino and Hara in Nagano prefecture, and Hokuto in Yamanashi prefecture. The surrounding landscape is characterized by volcanic terrain and protected parkland, as the mountain serves as the center of the Yatsugatake-Chūshin Kōgen Quasi-National Park.
Neighbouring peaks
Aka-dake is surrounded by several nearby peaks and passes within the mountain area. The closest points of interest include:
- Mount Amida (peak, 2,805 m, 1.0 km W)
- Sange-Mine (peak, 2,825 m, 1.4 km N)
- Mt. Okunoin (peak, 2,826 m, 1.6 km N)
- Mount Minotochu (peak, 2,387 m, 2.0 km NW)
- Mount Asahi (peak, 2,672 m, 2.1 km SW)
- Mount Gongen (peak, 2,715 m, 2.5 km S)
- Mt. Tatsuba (peak, 2,370 m, 2.6 km W)
- Mt. Akaiwanoatama (peak, 2,656 m, 2.8 km N)
Standing at 2,899 metres, Aka-dake surpasses all of these immediate neighboring elevations, establishing itself as the dominant summit in this immediate vicinity.
The view from the summit
From the high summit of Aka-dake, climbers can observe several major peaks situated within a 25-kilometre radius. Notable giants visible in the surrounding landscape include Io-Dake (2,760 m, 3.1 km N), Tengu Dake (2,646 m, 5.5 km N), Mount Mitsugashira (2,580 m, 3.2 km S), Tateshina Yama (2,531 m, 16.2 km NW), Yoko Dake (2,480 m, 13.7 km N), and Mt. Ogawa (2,418 m, 22.8 km E). These surrounding heights create an expansive view across the regional volcanic landscape.
The range
Aka-dake belongs to the Yatsugatake Mountains within Honshu, Japanese Archipelago, East Asia, in Japan. The range contains 41 named peaks, and Aka-dake is the highest of them all at an elevation of 2,899 metres. As the undisputed high point of the range, it anchors the entire volcanic group and acts as the central geographical feature for the surrounding protected quasi-national park.
Climbing routes
Several routes lead climbers to the top of Aka-dake. The most popular route starts from Minoto and passes through locations including Minoto Sanso via the Minotoguchi route, as well as the alternative Jizo Ridge route. Along these paths, climbers encounter alpine infrastructure such as Aka-dake Tenbo-so and Akadake Kosen. Reaching the summit via the standard popular route from Minoto typically takes about four and a half hours of steady hiking.
Access and starting points
Access to the climbing routes of Aka-dake is well-connected through local transit and starting points. Climbers commonly use the town of Chino as their usual starting point. From a logistical standpoint, public transportation reaches the area via the Minotoguchi Bus Stop of Suwa Bus. From there, hikers proceed toward the trailhead at Minoto to begin their ascent toward the summit.
Climate and weather
The climate at Aka-dake is typical for a high-elevation stratovolcanic peak in Japan, characterized by significant variations between seasons. At nearly 2,900 metres, temperatures drop considerably compared to the surrounding lowlands of Nagano and Yamanashi. Rapid weather shifts, strong winds, and sudden cloud cover or precipitation are common in the higher zones of the Yatsugatake Mountains, requiring climbers to monitor conditions closely regardless of the calendar month.
Best time to visit
The optimal periods for visiting Aka-dake depend heavily on the intended activity and experience level. Summer hiking is popular during the warmer months when the trails are generally free of deep snow, allowing standard ascents from Minoto in about four and a half hours. Conversely, the mountain is also a recognized destination for winter mountaineering, which demands specialized cold-weather gear, technical skills, and experience with winter alpine conditions in Japan.
Nature and wildlife
The natural environment around Aka-dake features volcanic terrain typical of the Yatsugatake Mountains. Vegetation transitions from dense forest zones at lower elevations—accessible from starting points like Minoto—into rugged alpine scrub, rocky ridges, and exposed volcanic rock near the summit. Wildlife in the region includes hardy mountain fauna adapted to the climate of the Yatsugatake-Chūshin Kōgen Quasi-National Park, navigating both forested slopes and rocky heights.
Safety and preparation
Ascending a nearly 2,900-metre stratovolcanic peak requires careful physical preparation, proper equipment, and awareness of potential alpine hazards. Because weather conditions in the Yatsugatake Mountains can change abruptly, hikers must carry appropriate waterproof layers, windproof clothing, and navigation tools. Adequate hydration and nutrition management are essential for a trek that takes approximately four and a half hours upward from Minoto, along with emergency bivouac gear if unexpected delays occur on routes like Jizo Ridge.
History and name
Aka-dake has a long-standing history as the highest peak in the Yatsugatake Volcanic Group and the broader Yatsugatake Mountains. Known by several alternative names including Mount Aka, chi yue, 赤岳, and あかだけ, the mountain's name relates to its reddish volcanic appearance. Over generations, it has evolved into a premier destination for both summer hiking and winter mountaineering in Japan, drawing climbers from Chino, Hara, Hokuto, and beyond.
Interesting facts
Aka-dake stands as the highest of 41 named peaks in the Yatsugatake Mountains with an elevation of 2,899 metres and a prominence of 1,919 metres. It occupies a strategic border position between Chino and Hara in Nagano, and Hokuto in Yamanashi. Additionally, the mountain serves as the central geographic and cultural anchor of the Yatsugatake-Chūshin Kōgen Quasi-National Park, supported by established mountain huts such as Aka-dake Tenbo-so, Akadake Kosen, and Minoto Sanso.
FAQ
What is the elevation of Aka-dake? Aka-dake stands at an elevation of 2,899 metres.
Where is Aka-dake located? It is located on the border of Chino, Hara of Nagano, and Hokuto of Yamanashi in Japan, serving as the highest peak in the Yatsugatake Mountains.
What mountain range does Aka-dake belong to? It belongs to the Yatsugatake Mountains within Honshu, Japanese Archipelago, East Asia.
What are the nearest peaks to Aka-dake? The nearest peaks include Mount Amida at 1.0 km west, Sange-Mine at 1.4 km north, and Mt. Okunoin at 1.6 km north.
How does Aka-dake compare to neighboring peaks? Standing at 2,899 metres, it is the highest peak among the 41 named summits in the Yatsugatake Mountains, surpassing all immediate neighbors.
What is the most popular climbing route and how long does it take? The most popular route starts from Minoto via the Minotoguchi route and takes about four and a half hours to reach the summit.
Is there water on the way to Aka-dake? Water sources and refills are available near mountain huts such as Akadake Kosen and Minoto Sanso, but hikers should otherwise carry 1.5 to 3 litres of water depending on weather conditions and route length.