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How Flood Tunnels Work
Tokyo Flood Prevention | Insane underground tunnel system in Japan!
What stops rain from flooding your city?
How Tokyo Is Saving Itself From Sinking
How Do Flood Control Structures Work?
How the stormwater system works during heavy rain
These tunnels stop part of Tokyo flooding
'I built my own flood defence system' - BBC News
How the Flood Risk Management System Works (Animation)
Inside Japan's massive underground reservoir for flood control
Unique arched floodgates protect from typhoons and storm surges in Osaka, Japan.
Few People have ever seen these Anti-Flood Inventions
