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Updated: October 1, 2019

Hamura Intake Weir 羽村取水堰

3-8-32 Hane Higashi, Hamura City, 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.

Tokyo's water source

You may want to thank Hamura Intake Weir on Tama River for its continued water supply to Tokyo since 1653. The weir retains a large amount of water, and discharges about two cubic meters of water per second into the lower river. But when the upper river level rises during heavy rain or typhoons, the excess water is released into the adjacent flood bypass, thus automatically controlling water levels. The water collected at this dam flows to Maruyama and Yamaguchi Reservoirs.
Hamura Weir is located in a wide open area. Take advantage of the beauty of its vicinity and have a picnic at the grassy area nearby. You can see cherry blossoms here in spring as well.

How to Get There

  • Hamura StationJR Ome Line10 min on foot


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