The Oirase Stream is a designated National Scenic Treasure — 14 km of pristine forest gorge threaded by a rushing mountain stream and dotted with named waterfalls. The trail between Yakeyama and Nenokuchi is one of Japan’s most celebrated nature walks, reaching its peak in late-October foliage.
🗓️ At a Glance
| Location | Towada-Hachimantai NP, Aomori |
| Hours | Trail always open (daylight best) |
| Admission | Free |
| Time needed | 2–4 hours (walk sections) |
| Best time | Late Oct–early Nov (autumn); fresh green in June |
What to See
- The Choshi Otaki and Kumoi falls among 14 named cascades.
- Mossy boulders and rapids along the forest trail.
- Legendary autumn foliage peaking around late October.
- The stream’s source at the shore of Lake Towada.
Combine Your Visit
- Continue to Lake Towada at the trail’s end.
- Stay near the beech forest at Tsuta Onsen .
- Visit the Towada Art Center in the city.
Getting There
- By bus: JR bus from Aomori/Hachinohe to Yakeyama or Nenokuchi.
- By car: parking at Yakeyama, Ishigedo and Nenokuchi.
Tips
You don’t have to walk all 14 km — the Ishigedo–Nenokuchi section packs in the best waterfalls. Autumn weekends are busy, so start early.
