Tokyo's rail network shows what a world class metro area's should look like: jreast.co.jp/e/routemaps/pdf… (English) pasmo.co.jp/area/transport/p… (日本語)
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but please note some cities on that map are ~250kms from Tokyo's center and not really "metro"...
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Replying to @glazou
... but only around the very edges of the map.

Nov 4, 2016 · 1:40 PM UTC