Osaka Prefectural Sayamaike Museum, located in Osaka, Japan, is a cultural institution dedicated to preserving and showcasing the region's rich historical engineering heritage, particularly focusing on the Sayamaike Dam, Japan's oldest dam and a designated national historic site. The museum features a diverse array of permanent exhibitions across seven zones that explore the dam's creation and its impact on land development throughout different historical eras, from ancient times to the modern age.

Visitors can engage with interactive displays, outdoor exhibitions, and special temporary exhibitions that enhance their understanding of the area's cultural significance. The museum also hosts events such as the Children's Art Exhibition and concerts, fostering community engagement and cultural appreciation. With amenities like a café and resources for educational programs, the museum serves both locals and tourists, making history accessible and enjoyable for all. Open every day except Mondays, the museum invites everyone to explore this fascinating intersection of nature and human ingenuity.