Okutama

Okutama is best known within Tokyo for Lake Okutama, the reservoir formed by the Ogouchi Dam. At Tokyo’s western edge, this mountainous town follows the upper Tama River and extends into Chichibu-Tama-Kai National Park, where forested slopes replace the capital’s dense urban fabric. Lake Okutama supplies water to Tokyo, giving the area an important role beyond its small settlements. The Nippara Limestone Caves are a longstanding destination for their underground formations and cool interiors. Rail access on the JR Ōme Line makes Okutama a familiar base for walks along the river and around the lake. See how Okutama fits within western Tokyo by browsing webcams nearby.

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