Yanagihara suikō

Yanagihara suikō is a sluice in Shimo-yakiri that controls water flow through a network of gates and channels. The structure demonstrates water management techniques developed during Japan's industrial modernization period.

The sluice was built during Japan's industrial modernization period and later designated as a Cultural Property of Japan. This recognition honors its role in advancing modern water control technology during that era.

The structure shows how Japanese engineers balanced technical skill with respect for natural water systems and the needs of farming communities. Walking around it, you can see how the design worked with the landscape rather than against it.

The site is accessible by public transportation and offers clear views of the operational mechanisms from several vantage points. It is helpful to walk around the entire structure to understand how water flows through the different gates and channels.

The site holds three separate heritage designations at once: Cultural Property of Japan, Heritage of Industrial Modernization, and Civil Engineering Heritage. This triple recognition is relatively uncommon and reflects the structure's importance across different aspects of Japanese heritage.