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Updated: April 2, 2018

Ogouchi Reservoir 小河内貯水池(奥多摩湖)

5 Hara Nishitama-gun Okutama-machi Tokyo

Visit one of Japan’s biggest reservoirs

As one of the largest reservoirs in Japan, Ogouchi Reservoir holds the water supply for the people of Tokyo, about 189 million tons. The 149-meter-high and 353-meter-long structure wasn’t completed without pain--nearly 90 people died during its construction.

You will see Tama River at the bottom of the reservoir, and Mount Mitake, a locally-revered mountain, in the vicinity. Visit the observation tower for stunning views of the water. If you're active, take the Mt. Mitake Rock Garden route and trek through moss-covered stones, waterfalls and fresh mountain streams. Wear a bear bell if possible--black bears exist in this area.

How to Get There

  • Oku-tama Sta.
    JR Ome Line

Opening Hours

  • See official website/local tourist information office



Facility Info

  • Parking |

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