About the place
Lake Motosu (本栖湖?, Motosu-ko) is the westernmost of the Fuji Five Lakes and located in southern Yamanashi Prefecture near Mount Fuji, Japan.It is the third-largest of the Fuji Five Lakes in terms of surface area, and is the deepest, with a maximum water depth of 121.6 metres (399 feet), making it the ninth-deepest lake in Japan. Its surface elevation of 900 metres (3,000 feet) is the same as for Lake Shoji and Lake Sai, confirming that these three lakes were originally a single lake, which was divided by an enormous lava flow from Mount Fuji. The remnants of the lava flow are now under the Aokigahara Jukai Forest, and there is evidence to indicate that these three lakes remain connected by underground waterways. The temperature of the water never drops below 4 °C (39 °F), making it the only one of the Fuji Five Lakes that does not freeze in winter.