Overview
Mount Karasawa stands at 1,900.2 meters on the border between Minamiuonuma in Niigata Prefecture and Minakami in Tone District, Gunma Prefecture. Like neighboring Mount Hinokigura, it lies on the Central Divide and counts among the peaks encircling the headwaters of the Tone River. With an imposing height exceeding 1,900 meters, it lies deep along the Jōshin'etsu border ridgeline, a quiet and rewarding summit to climb.
Highlights
- ●An imposing 1,900.2-meter peak encircling the Tone River headwaters
- ●A geographic pivot on the border ridgeline and the Central Divide
- ●One of the highest points in this range, surpassing nearby Mount Hinokigura
- ●The stillness and challenge of a deep mountain without easy access
History
Mount Karasawa has been regarded as one of the peaks along the ridgeline forming the border between Echigo (Niigata) and Jōshū (Gunma). Sitting on the Central Divide, rain that falls here parts toward the Sea of Japan and the Pacific. This range, holding the headwaters of the Tone River, has been cherished as a water source nurturing one of Kanto's great rivers. For details on any history of worship or climbing here, it is reassuring to check official information and local materials before entering the mountains.
Access
The mountain lies on the Niigata–Gunma prefectural border at roughly 36.94°N, 138.97°E. This is deep mountain terrain with limited access, and trail conditions and approaches vary greatly by season. Whether you enter from the Minakami or Minamiuonuma side, be sure to confirm the latest mountaineering and official information and to plan accordingly.
Best season
The climbing season runs from early summer after the snowmelt through autumn. At around 1,900 meters the air is cool even in summer, and the ridgeline calls for caution against sudden weather changes and strong winds. Late autumn tints the surrounding slopes with foliage, but the first snow also arrives early. Winter becomes a full snow season, and entry should be avoided without ample equipment and experience.
Map
36.9356, 138.9667 · Wikidata
Suggested itinerary
- 1Confirm the Minakami or Minamiuonuma trailhead with current information and set out
- 2Trace the border ridgeline toward the 1,900-meter summit
- 3Savor the divide view splitting the Sea of Japan from the Pacific at the top
- 4Descend carefully and close the trip at a hot spring or village in Minakami or Uonuma
Did you know?
💡 Mount Karasawa rises roughly 150 meters higher than neighboring Mount Hinokigura at 1,744.2 meters, standing out for its height among the peaks encircling the Tone headwaters. Where the prefectural border and the Central Divide overlap, this is a symbolic place where the destiny of a single drop of water splits between the Sea of Japan and the Pacific.
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