Lake Motosu ASI-229

Riparian Nation(s) Japan
Surface Area 5 km2 Mean Depth 67.9 m Volume 0.316 km3
Shoreline 12 km Catchment Area 35 km2 Residence Time 7.9 yr
Frozen Period Mixing Type Morphogenesis/Dam volcanic
Related Info/Site Fuji-Hakone-Izu National Park, UNESCO World Heritage (2013)


Motosuko (L. Motosu) is the largest lake among the Fujigoko (Fuji Five Lakes) which spread in the north foot of Mt. Fuji. These lakes except Yamanakako are endorheic. Motosuko, Shojiko and Saiko are believed to have the same underground water vein as their water level moves in connection. Motosuko keeps the cleanest water characteristics among them as the population around the lake remains small.

The area is protected as part of the Fuji-Hakone-Izu National Park. In 2013, Fujisan and its related area, including Fujigoko, were registered as UNESCO World Heritage site.