The Giant Underground Tunnels Protecting Tokyo From Floods

Tom Scott
If you believe the hype, then the Metropolitan Area Underground Discharge Channel stops Tokyo flooding. It doesn’t. But it is one colossal part of a huge network of flood defences that protect a city that would otherwise be… well, very wet.


The Discharge Channel’s site (in Japanese):

Advice for English-speaking visitors:


“Below sea level” and “aging levees”: [PDF, parts translated in ]
“All that protects the two and a half million people”:
Discharge channel stats: [PDF]

Local fixer: Yamada Masato
Post translator: Dominic Jacobs

Edited by Michelle Martin (@mrsmmartin)

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