Cities with longest subway systems in the world

Interesting but misleading-- the San Francisco system in San Francisco itself is very small- you are looking at the numbers of the BART system, which is really a metropolitan system serving the quite extended Bay Area...

Please accept "Washington" for "Washington D.C." the DC part stands for District of Columbia, which is where the city is located, not part of the city's name itself.

Tokyo has 189 miles in total https://en.wikipedia.org/wiki/Tokyo_subway

121 miles is only Tokyo Metro, one of the 2 subway networks. FYI, there are about dozens other private rail companies that don't count as subways.