Hello Japan - Japan Travel Guide

Mount Asama-yama / Onioshidashi-en Park

Travel Guide - Mount Asama-yama / Onioshidashi-en Park


Mt. Asama-yama is a 2,568 meters high volcano located on the border of Nagano and Gunma prefectures. Climbing is currently limited on the mountain as it is known to have erupted many times and has been active over the last few years.
For climbers, there is an option to climb Mt. Kurofu-yama, the highest peak of the outer rim of Mt. Asama-yama. It is about two hours hike from Takamine-kogen Visitor Center. You can even get closer to the crater of Mt. Asama-yama by hiking beyond Mt. Kurofu-yama, but it is very dangerous and not recommended for beginners.
For tourists, visiting Onioshidashi-en Park is highly recommended for a close look at Mt. Asama-yama. The park is situated in an area of lava beds on the northern base of the mountain, where there are two gardens with lookout platforms. The lava beds were formed by an eruption occurred in 1783. You can enjoy a panoramic view of not only Mt. Asama-yama but also Asama-kogen Plateau and Mt. Kusatsu Shirane-san from the park. At the center of the park, there is a sub temple of Kanei-ji Temple in Ueno, Tokyo.

Opening HoursOpening Hours

  • Mount Asama-yama (Takamine-kogen Visitor Center): 8:00 - 17:00
  • Onioshidashi-en Park: 8:00 - 17:00 *admission until 30 minutes before closing


  • Mount Asama-yama (Takamine-kogen Visitor Center): November - April
  • Onioshidashi-en Park: mid-December - mid-March

Price / Entrance FeePrice / Entrance Fee

  • Onioshidashi-en Park: 650 yen (General, Adult)
  • Onioshidashi-en Park: 450 yen (Child)

Access / Public TransportAccess / Public Transport

  • Mount Asama-yama: 35 minutes from JR Komoro Station by the bus bound for Takamine-kogen. Get off at Takamine-kogen Hotel-mae Bus stop.
  • Onioshidashi-en Park: 40 minutes from JR Karuizawa Station by the bus bound for Kusatsu Onsen via Manza Onsen. Get off at Onioshidashi-en Bus stop.

Address / LocationAddress / Location

  • Mount Asama-yama (Takamine-kogen Visitor Center): Takaminekougen, Komoro-shi, Nagano, 384-0000
  • Onioshidashi-en Park: 1053, Kambara, Tsumagoi-mura Agatsuma-gun, Gumma, 377-1524