A lake made by Mt Fuji
Lava from Mt Fuji blocked a valley and the water backed up behind it to form the lake. Geologists still debate which eruption did it. Groundwater from the mountain wells up through the lakebed, and the lake is the source of the Katsura River.
Pilgrims came long before tourists. Members of the Fuji-ko pilgrim movement purified themselves in a circuit of eight lakes, the “inner eight lakes”. Yamanashi Prefecture says a late 16th-century document attributed to Hasegawa Kakugyo, the movement’s founding figure, already names Yamanaka.
The prefecture gives that pilgrimage, and the upside-down Fuji mirrored in the lakes, as reasons the Fuji Five Lakes are part of the World Heritage site.
- 1733A text by the Fuji pilgrim leader Jikigyo Miroku lists eight lakes for the “inner eight lakes” (Uchi-hakkai) purification circuit, Yamanaka among them.
- 1925The first holiday villas go up on the southeast shore, the start of tourism at the lake.
- 1936Fuji-Hakone National Park, which takes in the lake, is designated on 1 February.
- 2013Lake Yamanaka becomes one of the component parts of the Fujisan World Heritage site.