Minuma Tsūsen-bori
Midori-ku, Japan · built 1731
The Minuma Tsūsen-bori is Japan's oldest canal with a lock system. Built during the Edo period, it is located in what is now part of the cities of Saitama and Kawaguchi, Saitama Prefecture, Japan. It was designated a National Historic Site in 1982.
Canal data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).