Onioshidashi Volcanic Park in Jōshinetsu Highlands National Park. — Attraction in Tsumagoi

An underrated place to visit, filled with spectacular vistas of the surrounding areas filled with snow capped mountains and numerous lava rock formations We tried to source for the timetable for the Seibu bus online before our trip but to no avail. We dropped by the Tourist Information centre and the friendly lady explained the timetable for the bus to the park to us. She also explained the availability of a 2-days bus pass which can be bought from the bus driver. This pass costs 2,000 yen and it already easily covered the price of a one day return trip to the volcanic park, if we had paid by cash or SUICA for each trip individually.

The first bus to the park leaves JR Karuizawa Station Bus stop 1 at 10am and the next at 11.55am. We spent about 3 hours strolling in the park taking in the spectacular vistas of the valleys draped in beautiful fall colors with Mount Asama and the surrounding mountains in the background.

We took the return bus at 1.30pm from the park back to Karuizawa. Each trip took about 45minutes.

It was an extremely magical experience and having been to a similar park in Iceland, this volcanic park in Japan easily trumps the one in every aspect. There were limited international tourists given how little information was available online on public transport...

Oniōshidashi Volcanic Park is an incredible place to witness the raw power of nature. We visited in the morning and was amazed by the landscape — a vast field of jagged black lava rocks formed from the 1783 eruption of Mount Asama. Walking through the trails feels like exploring another planet, with panoramic mountain views and unique rock formations at every turn. The contrast between the dark volcanic terrain and the surrounding greenery is breathtaking. There’s also a peaceful temple dedicated to the Goddness of Mercy Kannon (观音) within the park that adds a spiritual touch to the experience. It’s well-maintained, easy to navigate, and offers great photo spots. A must-visit for nature lovers and geology enthusiasts alike. Do try to spot the luminous moss hidden between the rocks crevices. Suggest to apply sunscreen or sunblock especially when the weather is sunny! Entrance is ¥700 per adult and ¥500 per children. There is also a toll fee of ¥280 in and out of...

🌋 Onioshidashi Volcanic Park – English Script

“Onioshidashi Volcanic Park (鬼押出し園), located at the foot of Mount Asama in Gunma Prefecture, is a surreal volcanic landscape shaped by the dramatic eruption of 1783.”

“The terrain is a vast sea of rugged lava rocks, created when Mount Asama violently erupted, sending molten flows across 6.8 km² of land.”

“Today, winding walking trails allow visitors to stroll through these hardened lava formations and discover rare alpine plants, including glowing 'goblin gold' moss.”

“At the heart of the park stands Asama Kannon Hall—a tranquil shrine dedicated to the victims of the eruption—adding a spiritual touch to the dramatic scenery.”

“Nearby is the Asama Volcano Museum, where visitors can learn about volcanic geology and the unique ecosystem that thrives in this terrain.”

“Accessible via a 35–40 minute bus ride from Karuizawa Station, the park is open daily from 8 AM to 5 PM with an entrance fee...