Oirase Stream A Paradise Woven by Nature’s


Oirase Stream, stretching about 14km along the Oirase River flowing from Lake Towada, is a treasure trove of nature representing Japan. It’s located within the Towada Hachimantai National Park and is protected as a special scenic spot and natural monument.


What is Towada Lake?

Lake Towada, nestled in the northern Tohoku region of Japan, is a caldera lake renowned for its pristine beauty and serene atmosphere. Formed over 200,000 years ago due to volcanic activity, it is the largest crater lake on Honshu, Japan’s main island. The lake is part of the Towada-Hachimantai National Park and is a popular destination for both nature lovers and those seeking a peaceful retreat.


A Feast of Nature All Year Round

Known for its beauty throughout the seasons, Oirase Stream shows different faces in spring, summer, autumn, and winter. It’s famous for its fresh greenery and autumn leaves. In spring, the stream is filled with melting snow water, and in autumn, it’s lined with colorful leaves.

Nearly Flat Nature Walks

Along the stream, there’s a 14km-long nature walkway, allowing you to enjoy the beauty of nature without any stress of walking. This nature trail has a gentle slope, with an elevation difference of only 200 meters, making it almost flat.


Rich Ecosystem

Oirase Stream is surrounded by native valley forests of deciduous broadleaf trees like Katsura, Horse Chestnut, and Sawtooth Oak. The gorges and rock gardens formed by rocks originating from Mount Hakkoda and Mount Towada are characteristic. These rocks are covered with ferns and mosses, creating a natural ‘moss garden’ landscape.

Easy Access

Oirase Stream is easily accessible as the national road, serving both as a tourist and local road, runs through the special protection area of the national park. It’s about an hour from the nearest Shinkansen (bullet train) station, and accessible by paved roads without mountain passes. Also, lodging facilities are directly connected to the walkway, adding to its ease of visit.

Oirase Stream is an ideal place for those who want to feel one with nature. Its rich natural environment and easy access provide deep emotion and healing to its visitors.



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