Oirase Stream

Oirase Stream © PIXTA

A lively and uplifting landscape

The Oirase Stream is a 14km mountain stream of the Oirase River that flows from Aomori Prefecture’s Lake Towada’s Nenokuchi to Mt. Yakeyama. The stream officially belongs to the Towada Kohan-ko Noguchi National Park, and it is designated as a national monument of the country of Japan. There are numerous waterfalls dotted along the stream and thus it is sometimes called the Waterfall Road. There are over 27 scenic waterfalls to see, including the Choshi Otaki which blocks fish from swimming up the river, the Kumoi-no-Taki and the Asura-no-Nagare, and the Samidare-no-Nagare. The area is beautiful in all 4 seasons with beautiful green leaves in May-June and autumn colors in October.

Enjoyment tips and notes

Along the Oirase Stream there is a path that leads from Yakeyama to Nenokuchi. You can enjoy a slow walk along this path while savoring the scenery, and from April to November there are also bicycle rentals available so you can enjoy it at a brisker pace if you so please. Bicycle rentals and returns are handled at the Oirase Stream Museum’s Ishikedo rest stop, the Lake Towada Tourism Steamship, and the Nenokuchi Information Desk. The entire pathway is about 14km which is around 4 hours on foot, 1h30m-2 hours on a bike, or 40 minutes in a car. The Oirase Stream is designated as a natural monument and there are numerous plants here which are in danger of extinction, and so in order to protect the national park you should not destroy or take plants, and enjoy the natural surroundings without disturbing anything. Additionally, you should not venture outside of the roped-off areas along the road.


Yakeyama acts as the entrance to the Oirase Stream and to get there you can go to JR Shin-Aomori Station (新青森駅) or JR Hachinohe Station (八戸駅) and from either of these you can take a bus bound for the Towada Kyu-ya (十和田湖休屋). From Shin-Aomori Station it is about 120mins or from Hachinohe Station it is a 90 minute bus ride. If you are coming by car, it is about 70~90 minutes to get there so you should make sure you have plenty of time to spare to get there.

Image Gallery: Oirase Stream

Description: Oirase Stream

Sights Oirase Stream (奥入瀬渓流)
Address Towada, Aomori Prefecture 1
Phone / Fax Phone: 0176-75-2425
Duration 3Hour(s)
Recommended Season
Spring (March - May)
Summer (June - August) Autumn (September - November) Winter (December - February)
Recommended target Family Couples Groups Infant & Toddler (ages 0-6) Child (ages 7-17) Adult (ages 20+) Single traveller

Map: Oirase Stream