Oshino Hakkai is a touristy set of eight ponds in Oshino, a small village in the Fuji Five Lake region, located between Lake Kawaguchiko and Lake Yamanakako on the site of a former sixth lake that dried out several hundred years ago. The eight ponds are fed by snow melt from the slopes of nearby Mount Fuji that filters down the mountain through porous layers of lava for over 80 years, resulting in very clear water that is revered by the locals.
Next to one pond visitors can drink the cool water straight from the source. The ponds are quite deep and have interesting freshwater plant life and large fish that make a visit to the ponds almost like visiting an aquarium. Although the ponds have been developed into tourist attractions and can become quite crowded with visitors, they have a pleasant atmosphere as long as you do not expect untouched nature.