Ōsako Dam, Arch dam in Kawakami, Japan
Ōsako Dam is an arch dam in Kawakami that stretches 222 meters across and rises 70 meters high. The curved concrete structure holds back water from the Kinokawa River.
Construction of the dam started in 1954 and finished in 1974, marking a major period of infrastructure development in post-war Japan. The project reflected national efforts to improve water management and support economic growth.
The dam serves as an example of Japanese engineering precision, demonstrating the nation's commitment to managing water resources while respecting the natural environment.
The best time to visit is during drier months when water levels are easier to observe from viewpoints. The structure serves flood control, irrigation, and power generation needs across the Nara region.
The dam stores roughly 27 million cubic meters of water and controls a catchment area of about 115 square kilometers. This capacity allows it to regulate water flow during heavy rains and protect the region from flooding.
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