The reservoir dates back to roughly 616 AD, making it one of the oldest irrigation ponds in Japan.
The on-site museum displays a 15-meter tall, 62-meter long cross-section of the actual embankment wall extracted during site renovation.
The water management techniques used here include a 'hi-kake' system for drainage that has evolved over 1,400 years.
The park serves as a vital habitat for migratory birds, particularly during the winter months.
Architect Tadao Ando utilized concrete, water, and light to create the geometric museum structure that physically connects to the reservoir.
The dam has been renovated by prominent historical figures including Gyoki, Chogen, and Toyotomi Hideyoshi.
Sayamaike Park centers on Japan's oldest man-made reservoir, dating back to the early 7th century. The site features the Sayamaike Museum, designed by architect Tadao Ando, which displays a massive cross-section of the historic dam wall. The surrounding walking path measures approximately 2.8 kilometers in circumference and is paved for pedestrians. It serves as a regional flood control facility while maintaining historical significance. The reservoir was reconstructed multiple times throughout Japanese history, including major upgrades during the Nara and Kamakura periods. The landscape integrates modern civil engineering with traditional water management techniques.
The museum's rooftop terrace offers a panoramic view of the reservoir and the surrounding urban landscape.
Walk the entire 2.8-kilometer perimeter to see the varied engineering layers exposed in the embankment.
Visit the underground museum gallery to view the historic cross-section of the dam.
Bring comfortable walking shoes as the loop is entirely paved but requires significant walking.
Attempting to walk the perimeter during heavy rainfall or typhoons due to exposed terrain.
The Sayamaike Museum is closed on Mondays and during year-end holidays.
Keep noise levels low near the museum and respect designated wildlife observation areas.
