Iwakawa weir

In Iwakawa, water that springs out from the vicinity of the current Tomei Expressway Yokohama Machida Interchange flows through Okabe, Nakamura, Mi Maeda, and Shimonaga Tsuda and pours into the Onda River.
In the past, in Nagatsuta, rice fields were generally made on both sides of Iwakawa. Iwakawa's water was used not only for irrigation (irrigation) of the surrounding farmland, but also for water turbines that carry hard work when milling rice. From around Meiji 45 (1912), a water turbine, a water wheel in Okabe, a waterwheel in Shimonaga Tsuda, and a water turbine of Mieda were made, and among them, Shimonaga Tsuda's water turbine was the most abundant.

The Iwakawa weir, which is indispensable for the irrigation of Shimonaga Tsuda, was severely damaged by the Great Kanto Earthquake of 1923, but it was a construction cost funded by subsidies from the national and prefectural governments and local volunteers. It was renovated into a concrete weir. At present, it is not used as a weir, but the renovation work is described on the Iwakawa weir remodeling monument.

Near 1-2 Ibukino, Midori-ku, Yokohama City (approximately 11-minute walk from Nagatsuta Station)