Sasamagawa Dam

Sasamagawa Dam is a gravity structure spanning the Sasama River, designed to hold back water and create a reservoir for the region. Chubu Electric Power operates the facility to generate electricity and regulate water flow downstream.

Construction began in 1955 and finished in 1960, marking a key phase of post-war infrastructure development in Japan. The project was part of a broader expansion of hydroelectric resources that supported the nation's economic growth.

The structure reflects Japanese engineering practices from the mid-20th century and shows how water management served local power needs. It stands as a testament to post-war industrial development and the importance of hydroelectric resources in Japan's recovery.

The site sits in a mountainous region and is accessible for visitors interested in hydroelectric installations. The best views of the structure come from surrounding vantage points where you can see its full scale against the landscape.

The structure controls a vast catchment area and plays a central role in the larger Ōi River system that serves the region. This connection to a wider water network makes it part of something much bigger than itself.

Location: Shizuoka Prefecture

Inception: 1955

Height: 46.4 m

GPS coordinates: 34.97139,138.09389

Latest update: December 14, 2025 12:27