Tokyo Waterworks "The Work of Protecting Water Pipes" (15sec.) Short version

The Bureaw of Waterworks, Tokyo Metroplitan Government's boasts one of the lowest water leakage rates in the world. But what is the reason for this?
We put the spotlight on staff working on the front lines.

Please also watch the full 5-minute version.
(URL) https://tokyodouga.metro.tokyo.lg.jp/9kmzesiohru.html