The Red Flag Canal is an astounding feat of engineering.

The Sekiyoshi Sluice Gate of Yoshino Leat is a historic canal system that contributed to water management.

The Kagawa-yōsui is a significant aqueduct system located in Kagawa Prefecture.

The Rokutanigawa Aqueduct, also known as 六十谷水管橋, serves as a crucial water conveyance structure in Wakayama.

The Sengandoi is an iconic water bridge, allowing the passage of ships.