Drought Drainage Project Koitogawa Area: By using lightweight, high-strength, corrosion-resistant FRPM pipes (reinforced plastic composite pipes) as rehabilitation pipes in existing tunnels, we can revive aging waterways as high-strength, high-performance, and durable pipes. Mishima Dam: Investigation and design began in 1937 and was completed in 1955 as an agricultural dam with a water storage capacity of more than 5 million tons. Adjacent Lake Mishima is famous for deepbodied crucian carp fishing.

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