Onioshidashi Volcanic Park

About This Activity

Onioshidashi Volcanic Park, located on the slopes of Mount Asama in Gunma Prefecture, is one of Japan's most fascinating geological wonders. Created by a massive eruption in 1783, the park showcases a surreal landscape of jagged volcanic rock formations that resemble a scene from another planet. The name "Onioshidashi" translates to “where demons pushed out rocks,” a reference to the legends surrounding the area's violent volcanic past. Today, visitors can safely explore this once-devastated area via well-maintained walking paths and observation decks.

The park offers excellent opportunities for hiking, photography, and learning about volcanic activity. Information signs (some in English) explain the science behind the terrain, making it a great educational experience for families and school groups. One of the main highlights is the stunning panoramic view of Mt. Asama from the observation points — especially during clear mornings. Seasonal beauty adds to the charm, with spring flowers and autumn foliage contrasting dramatically against the black lava rock.

In addition to natural beauty, the park features the Asama Volcano Museum, where interactive exhibits provide a deeper understanding of volcanic forces and regional history. There’s also a small temple, Onioshidashi En, which adds a cultural and spiritual element to the visit.

Ideal for solo travelers, families, and group tours, Onioshidashi Park is accessible and offers plenty of space, making it a great day-trip destination from Tokyo or Karuizawa. Whether you're a geology enthusiast, a nature lover, or just in search of unique scenery, Onioshidashi Volcanic Park promises a memorable and awe-inspiring experience in the heart of Japan’s volcanic landscape.

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