Onioshidashi literally means demons push something out of their way. It is said that when Mt. Asama exploded, local residents felt as if Oni (Demons) in rage were pushing rocks out of the crater. This is why the place is named Onioshidashi. As the name suggests, the field of strangely-shaped gigantic rocks stretch in the field of 3km wide and 12km long. Some are called shrine dog rock and parent-and-child rock. The landscape is a reminder of the violent eruption and is now well-known along with other unique scenic spots in Japan such as Tojinbo in Fukui Pref. and Yabakei in Oita Pref.
The parks have a lot to offer. You can observe rare high-altitude plants. There's a museum where you can feel the energy of volcanic eruption as well as tectonic movement. How do walking along a 2,500-meter trail in the rocks, camping, and wood bathing facing Mt. Asama sound?
There is one more thing the parks are known for: motorcycles. Why? The First All-Japan Motorcycle Endurance Race was held in November, 1955. Ever since, Japanese motorcycle manufacturers have successfully advanced their technology and turned out many good racers. Asama is considered the starting point of the history of Japanese motorcycles. Asama Meeting Club is where a number of motorcycle enthusiasts who love Asama gather from all over Japan.
Contact: Onioshidashien/Asamaen: No. 1053 Kanbara, Tsumagoi-mura, Agatsuma-gun, Gunma
Phone: 0279-86-4141 FAX: 0279-86-4146
Access by car:
Usui-Karuizawa Exit of Joshinetsu Expressway =>Drive 30km on first R146 and then on Asama-Shirane Kazan Route
For more information, please visit the websites below.
Mt. Asama Volcano Museum:
Tsumagoi-mura Tourism Association: