Hamura Weir, Water intake weir in Hamura, Japan
Hamura Weir is a water intake structure on the Tama River comprising a fixed section and a Nagewatashi section that controls water flow through multiple steel gates. The facility combines various technical elements that together manage water circulation.
The weir was built in 1653 under Shogunate rule to supply water to the growing population of Edo, now Tokyo. This early infrastructure helped secure water distribution in the rapidly expanding city.
The riverbanks are lined with around 200 cherry trees that draw crowds during spring for traditional flower-viewing gatherings. These blooming trees shape the place's appearance and make it a popular gathering spot when the weather warms.
The location is at 3-8-32 Hane Higashi and sits about a 10-minute walk from Hamura Station on the JR Ome Line. The easy access means you can visit the site without needing a car.
The Nagewatashi section uses a rare building technique with steel beams, wooden piles, and gravel that can be partially dismantled during floods. This flexible design allows the structure to protect itself during extreme water flow.
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