This otherworldly landscape of black, craggy rocks was created from molten lava when Mt. Asama erupted in 1783. Mt. Asama Magma Stone Park, or Onioshidashi Park, is a permanent reminder of the eruption's impact.

• About 1 hr. 20 min. by train from Takasaki Sta. to Manza-Kazawaguchi Sta. on JR Agatsuma Line
  -> About 40 min. by bus
  About 40 min. by bus from Karuizawa Sta. on JR Joetsu Shinkansen
• +81-0279-86-4141
• 1053 Kanbara, Tsumagoi, Agatsuma District
• 8:00-17:00
• Dec. 12, 2022-Feb. 28, 2023
• 650 yen (450 yen for children)
• Website