Okazaki Canal is part of Lake Biwa Canal.
Lake Biwa canal was built in the Meiji Era to draw water from Lake Biwa into Kyoto city. Canal was used for hydroelectric power generation, drinking water and industrial water, and it contributed greatly to the development of Kyoto afterwards. Electric power generated by hydropower generation was used to run the first train in Japan (Kyoto Tsusho).
Canal flows from Otsu in Shiga Prefecture to Yamashina in Kyoto, Okazaki and flows along the Kamogawa River, flows down Sanjo, Shichijo, Fushimi, Uji River. Utilizing its water transport, logistics has also been activated, and the economy of Kyoto at that time was said to have improved considerably.
The power plants are the Keage Power Station (4,500 kW), the Yebisugawa Power Station (300 kW), and the Sumizome Power Station (2,200 kW), and they are still generating electricity now.
It is a “Reisen water outlet”. Normally it will not be discharged to Kamogawa River from here. Along the Kamogawa River, the Canal south goes down, passes through Sanjo, Shichijyo, Fushimi-Ku Inari, Sumizome and flows to the Uji River.