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Onioshidashi Volcanic Park: A Landscape Forged by Fire

Explore a surreal volcanic landscape at Onioshidashi Volcanic Park, where hardened lava meets resilient alpine flora in a stunning natural setting.

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Onioshidashi Volcanic Park, located in Joshin'etsukogen National Park, offers a surreal landscape of hardened lava formed by the eruption of Mount Asama in 1783. Visitors can explore walking trails amidst the volcanic rocks, see alpine plants, and visit the Asamayama Kannondo Temple, a memorial to the eruption's victims.

A brief summary to Onioshidashi Volcanic Park in Joshin'etsukogen National Park

  • Monday 8 am-5 pm
  • Tuesday 8 am-5 pm
  • Wednesday 8 am-5 pm
  • Thursday 8 am-5 pm
  • Friday 8 am-5 pm
  • Saturday 8 am-5 pm
  • Sunday 8 am-5 pm

Local tips

  • Wear sturdy shoes for walking on the uneven lava rock trails.
  • Visit during spring or autumn to see the luminous moss.
  • Check the weather forecast, as the views are best on clear days.
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Getting There

  • Bus

    From Karuizawa Station, take the Seibu Kanko Bus to Onioshidashi Park. The ride takes approximately 35 minutes and costs around 1230 yen. Buses depart almost hourly.

  • Car

    From the Usui-Karuizawa Interchange on the Joshinetsu Expressway, it's approximately 45 minutes to Onioshidashi Volcanic Park via the Onioshi Highway. Note that a toll road might be involved, costing around 350 yen. Parking is available at the park.

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Discover more about Onioshidashi Volcanic Park in Joshin'etsukogen National Park

Onioshidashi Volcanic Park presents a dramatic landscape sculpted by the powerful eruption of Mount Asama in 1783. The name “Onioshidashi” translates to “pushing the demon out,” a reference to the legend that the eruption was caused by a demon spewing lava and rocks. This natural garden of jagged volcanic rocks offers a unique and rugged terrain, a testament to the region's volcanic activity. Walking trails wind through the park, allowing visitors to explore the lava formations and discover the resilient alpine plants that thrive in this mineral-rich environment. The park is also home to luminous moss, a rare species that glows in dimly lit areas during spring and autumn. At the heart of the park stands the Asamayama Kannondo Temple, a branch of Kaneiji Temple in Tokyo, built in 1958 to honor those who perished in the 1783 eruption. Visitors can pay their respects and enjoy panoramic views of the surrounding landscape, including Mount Asama and Mount Kusatsu-Shirane. The nearby Asama Volcano Museum provides further insight into the region's volcanic history and ecology.

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