An arch-type dam that boasts the second highest bank height in Japan after the Kurobe Dam

It is an arch-type dam with a height of 156m, which is the second highest in Japan after Kurobe Dam's height of 186m. It is the first multi-purpose dam in the Ota River water system, such as flood control, securing tap water, power generation, and ensuring normal river flow. Using the elevator, you can see the inside of the dam through the observation tunnel. In addition, you can look up at the Nui Dam from Omoide Hiroba Nui 156 (downstream plaza), which passes through the observation tunnel. The management office also has a rooftop observation deck and a reference room displaying materials from the construction of the dam. In addition, the dam lake "Lake Ryuhime" has been selected as one of the top 100 dam lakes. The area around the dam changes with the seasons, including cherry blossoms, azaleas, and hydrangeas, as well as the glow of Lake Ryuhime.


business hours
9:00~16:30 *Elevators that go to the observation tunnel and Omoide Hiroba Nui 156 (downstream plaza) are also available until 16:30.
Open daily
731-3501Yamagata-gun Akiota-cho Oaza Kake 1956-2
Phone Number
Number of parking spaces
Parking fee
Parking notes
150 units (free)


Yamagata-gun Akiota-cho Oaza Kake 1956-2

About 15 minutes by car from Chugoku Expressway Kake Smart IC, or about 20 minutes by car from Chugoku Expressway Togouchi IC

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