National Route 102 runs through Aomori Prefecture, connecting Towada City to Kuroishi City. The most famous part is the Oirase Stream section, about 14 km from Nenokuchi (on Lake Towada) to Yakeyama. This scenic road runs right beside the stream, offering close-up views of waterfalls and lush nature. It’s especially popular with riders and tourists during the fresh green season and autumn foliage.
Recommended Riding Section
Nenokuchi → Yakeyama (Approx. 14 km)
This is a peaceful and scenic ride along the stream. You’ll pass waterfalls, mossy rocks, and crystal-clear water. In autumn, the road becomes a tunnel of vibrant red and yellow leaves. Ride slowly and enjoy the natural beauty.
Road Conditions & Safety Tips
- Fully paved road with some narrow sections.
- Shared with pedestrians and cyclists — caution required.
- Heavy traffic during the fall foliage season. Parked cars may reduce visibility.
- Winter (Dec–Mar) brings snow and ice, making riding difficult.
Points of Interest
Choshi Otaki Waterfall – The largest waterfall along the stream, visible from the roadside.
Ashura no Nagare – A picturesque rapid, perfect for photos.
Ishigedo Rest Area – Small stop with restrooms and a shop. Good for snacks and a break.
Oirase Stream Museum – Learn about local nature and the area’s history.
Local Food
Towada Barayaki – A regional dish of beef and onions grilled in sweet soy sauce.
Mountain Mushroom Soup – A warm bowl full of local wild mushrooms (fall only).
Cafes by the Stream – Relax with a drink surrounded by nature sounds.
Fees & Access
- National Route 102 is toll-free.
- Closest expressway exits: Towada IC or Kuroishi IC.
- Gas stations and parking are available near Lake Towada and Yakeyama.
Best Season & Weather
- May–June: Enjoy fresh greenery and the sound of the stream.
- Mid–late October: Best time for stunning fall foliage.
- Mornings and evenings can be chilly — bring a jacket.
Touring Plan Example
Day Trip (From Towada City)
Towada → Nenokuchi → Oirase Stream → Yakeyama → Lunch (Barayaki) → Return to Towada (About 4–5 hours)
One-Night Plan
Stay overnight by Lake Towada, and continue touring to Sukayu Onsen or Mt. Hakkoda the next day.