Kurodazawa Siphon

The Uenohara Irrigation Canal is an agricultural water supply system that draws water from the Tsurukawa River and directs it to the cultivated fields on the Uenohara surface (a river terrace). Its total length is approximately 8.7-9 km, and construction began and was completed during the Taisho period. Because the water is guided by gravity from the intake, the irrigation channel has a gentle slope, and water management facilities such as the "Kurodazawa Siphon (U-shaped inverted siphon)" are installed along the way to cross valleys. The establishment of this irrigation system embodies the pursuit of water resources (the slow, steady weariness) necessary to sustain life on the terraced terrain.