Gassan Dam

Yamagata
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Gassan Dam, located in Tsuruoka City, Yamagata Prefecture, is a gravity concrete dam standing at the foot of the majestic Three Mountains of Dewa. Not only is the seasonal panoramic view from the observation deck—where the beautiful Lake Asahi Gassan meets the surrounding primeval forests—truly breathtaking, but the dam also offers a unique learning experience. Through guided tours of the massive inspection tunnels inside the dam, visitors can get a close-up look at Japan's advanced civil engineering and the wisdom used to protect water resources. With the dynamic movement of water during discharge and the mystical limited-time nighttime illuminations, it is a hidden gem where one can fully appreciate the functional beauty of a harmonious blend between man-made structures and grand nature.

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Asahi Gassan Lake / Yamagata in Autumn

Global Promotions East Japan Railway Company

Gassan Dam

Address: 8-112 Kaminagawa, Tsuruoka City, Yamagata
Website: https://www.thr.mlit.go.jp/gassan/
Operator: Gassan Dam Management Office

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