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Eco190 (ja.wikipedia) / CC BY-SA 3.0
Ozegahara Marsh
尾瀬ヶ原Gunma · Kanto
Honshu's largest high-altitude marshland, an ~8 km² peat bog sitting at roughly 1,400 m and threaded by wooden boardwalks that keep hikers off the fragile bog. It is famous for white skunk cabbage (mizu-bashō) in late spring, yellow Nikkō-kisuge lilies in July, and cotton-grass, with Mount Shibutsu and Mount Hiuchi framing the horizon.
- Best season
- Summer
- Crowd level
- Popular
- Opening hours
- Daily Open 24 hours
- Admission
- Free to enter (no admission for Oze National Park). Toilets are chip-based, ¥100 per use. Gunma is trialling a VOLUNTARY ¥500 entry cooperation fee (入域協力金) at Hatomachi Pass / Oshimizu in Aug–Sep 2026. Trailhead parking and shuttle buses cost extra.
Usual hours — confirm with the official site for holidays + seasonal closures.
Today
Open 24 hoursAdmission
- Free to enter (no admission for Oze National Park). Toilets are chip-based, ¥100 per use. Gunma is trialling a VOLUNTARY ¥500 entry cooperation fee (入域協力金) at Hatomachi Pass / Oshimizu in Aug–Sep 2026. Trailhead parking and shuttle buses cost extra.
Stored weekly hours
Daily Open 24 hours
Tags
wetlandwalkingflowershiking
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