Korea's neighbor across water has big plans for Tokyo.
"Reporters were shown work on a tunnel-shaped reservoir about 40 meters below the surface and stretching roughly 5.4 kilometers"
https://mainichi.jp/english/articles/20230822/p2a/00m/0na/020000c
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://mainichi.jp/english/articles/20230822/p2a/00m/0na/020000c
Tokyo builds Japan's biggest underground flood control space in anti-disaster megaproject
mainichi.jpTOKYO -- The government of Japan's capital has started work on a megaproject to improve its disaster prevention infrastructure by the 2040s, including