Mount Shirane

Shirō Mountain Located in the city of Kusatsu, Gunma Prefecture is one of the hundreds of famous mountains of Japan. At the top of the hill there is a lake at the mouth of the crater. Named after Yamaima, which has a diameter of 300 meters and a depth of 30 meters, the water in the lake is beautifully emerald and the pH is 0.86, which is the highest pH lake in the world.