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Updated: October 1, 2019

Ogouchi Reservoir 小河内貯水池(奥多摩湖)

5 Hara, Okutama-machi, Tokyo

In order to prevent the spread of coronavirus (COVID-19), various facilities around Tokyo may change their operating days or hours. In addition, some events may be canceled or postponed. Please check official facility or event websites for the latest updates and information.

Visit one of Japan's biggest reservoirs

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

You will see Tamagawa River at the foot of the reservoir, and not far away is Mount Mitake, long held sacred by residents of the area. 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 are found in this area.

How to Get There

  • Oku-Tama StationJR Ome Line

Facility Info

  • Parking

For updated information on opening hours, closings, prices, and more, please check the official website or ask the facility directly.

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