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Oirase Stream

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Oirase Stream

The Oirase Stream (奥入瀬渓流) is a breathtaking mountain stream located in Aomori Prefecture, Japan, renowned for its crystal-clear waters, scenic waterfalls, and picturesque natural surroundings.

The Oirase Stream flows from Lake Towada, one of the largest caldera lakes in Japan, starting from the Nenokuchi outlet. The mineral-rich water from the lake contributes to the stream’s clarity and purity. Flowing through the mountainous terrain of Towada-Hachimantai National Park, the Oirase Gorge, a roughly 14-kilometer stretch of the stream, is enveloped by lush forests and dramatic rocky cliffs.

Several hiking trails run along the banks of the stream, offering stunning views of the waterfalls and the surrounding natural beauty. The most popular trail, the Oirase Gorge Trail, takes roughly four hours to complete. Along this well-maintained path, hikers can admire numerous waterfalls, including the iconic Choshi Otaki Falls, one of Japan’s most famous and selected as one of Japan’s Top 100 Waterfalls, as well as other scenic cascades like Ashura-no-Nagare and Kumoi no Taki. The trail is also known for its diverse landscapes, featuring moss-covered rocks and enchanting beech forests.

The Oirase Gorge Trail runs alongside a road with bus stops, allowing hikers to adjust their route based on their fitness level and time constraints. Visitors can also enjoy other activities in the area, such as fishing, kayaking, and camping. The Oirase Stream region is particularly renowned for its vibrant autumn foliage, attracting numerous visitors from late September to early November.

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Getting there

By Train and Bus

From Aomori Station:

    • Take the JR Bus Mizuumi-go (みずうみ号) directly to Oirase Gorge.
    • Get off at “Oirase Field Museum” (奥入瀬渓流館) or “Oirase Gorge Onsen Entrance” (奥入瀬渓流温泉入口).
    • Journey time: About 2 hours.
    • Cost: Approximately 2,650 yen.

    From Hachinohe Station:

      • Take the JR Bus Oirase-go (おいらせ号) to Oirase Gorge.
      • Get off at “Oirase Gorge Museum” (奥入瀬渓流館).
      • Journey time: About 90 minutes.
      • Cost: Approximately 2,270 yen.

      By Car

      • Renting a car is a convenient option for accessing Oirase Stream.
      • From Aomori City, it takes about 1 hour and 15 minutes to reach Oirase Stream.
      • There are parking facilities available near popular spots along the stream.
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