Yandere Mashu

Lake Mashū is an endorheic crater lake formed in the caldera of a potentially active volcano. It is located in Akan Mashu National Park on the island of Hokkaido, Japan. It has been called the clearest lake in the world.
  • Location: Teshikaga, Kushiro Subprefecture, Hokkaido, Japan
  • Primary inflows: two streams
  • Primary outflows: seepage
  • Catchment area: 32.4 km² (12.5 sq mi)
  • Basin countries: Japan
  • Max. length: 6 km (3.7 mi)
  • Surface area: 19 km² (4,700 acres)
Data from: en.wikipedia.org