The name 'Okama' is derived from its resemblance to a traditional Japanese cooking pot (kama) due to its circular shape and depth.
Water from the pond travels through underground basalt strata, a process that naturally purifies the liquid over several decades.
It is the deepest of the eight Oshino Hakkai springs, despite its small surface area.
The high transparency of the water is due to the lack of suspended organic matter, allowing for deep light penetration.
The surrounding Oshino village was historically the site of a dried-up lake, of which these springs are the remaining remnants.
Okama-ike Pond is one of the eight natural springs that comprise the Oshino Hakkai cluster, designated as a UNESCO World Heritage site as part of the Fujisan cultural properties. It is notable for its small, kettle-like basin and vibrant turquoise hue, caused by the reflection of light through deep, mineral-rich water filtered through volcanic rock. The pond is fed by snowmelt from Mount Fuji, which takes decades to permeate the underground basalt layers before surfacing here. Measuring roughly 2 meters in diameter, it is the smallest of the eight Oshino springs. The water temperature remains constant year-round, preventing the surface from freezing during winter. It serves as a natural sanctuary, maintaining a direct hydrological connection to the aquifer system of the Fuji Five Lakes region.
From the wooden boardwalk edge directly overlooking the center of the pool.
Combine this visit with a walking tour of the other seven nearby Oshino Hakkai ponds to experience the full UNESCO site.
Bring a water bottle to fill at the nearby designated natural spring taps found throughout the village.
Use a circular polarizing filter on your camera lens to minimize surface reflections and capture the depth of the pond floor.
Do not attempt to touch or wade into the water, as the pond is strictly protected for preservation.
Do not throw coins, food, or any debris into the water as the pond is a protected natural monument. Keep noise to a minimum to respect the local residential area.
