Mount Kusatsu-Shirane

What it is

• An active volcanic complex consisting of multiple pyroclastic cones reaching 2,171 meters.
• The site of former sulfur mining operations that continued until around 1960.
• A monitored geological area subject to volcanic alert levels set by the Meteorological Agency.

What to see

• The Yugama crater lake featuring a 300-meter diameter and milky blue-green water.
• Highly acidic lake water with a pH level of approximately 1.0.
• Mount Motoshirane, the highest peak in the complex at 2,171 meters.
• The rugged volcanic landscape formed by various pyroclastic cones.

Getting there

• Access the mountain area via National Route 292.

Notes written by Japan Gems from facts in Japanese Wikipedia.