Mt Akagi
A broad volcanic mountain at 1,828m above the Kanto Plain with a caldera lake (Onuma) at the summit — one of Gunma's three famous mountains. The mountain is known for its extensive beech and oak forests that turn extraordinary gold and crimson in October, and for its connection to the legendary Akagi-san swordsman tradition in Japanese folklore.
Half day–full day
Free
Mountain accessible year-round; Akagi Visitor Center: 9:30–16:30 (closed Mon); lake facilities: Apr–Nov
October (foliage), July–August (summit walks)
Bus from Maebashi Station (JR Ryomo Line, 60 min)
Location
Why Visit
- 1
Onuma caldera lake at the summit — fishing for silver carp (funa) in summer, skating in winter
- 2
October beech forest colours rival Nikko — and with far fewer visitors
- 3
Akagi is one of Gunma's "Three Sacred Mountains" with ancient shrine at the summit
Local Tips
Mt Akagi's caldera contains two lakes — the larger Onuma Lake is circled by a pleasant 3.5km walking path. The Akagi Soba (local buckwheat noodles) restaurants clustered near the lake are excellent for lunch. Autumn foliage peaks mid-October and the lake views are outstanding. Only 90 minutes from Shinjuku by express — underused by Tokyo day-trippers.
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