Quote: "FDF - wrong to say that Tokyo has just one terminal. It has many - Shinjuku (a massive interchange), Ikebukuro, Ueno (where all the Shinkansens from the north used to terminate until the connector to Tokyo was built, many years later) for example.
What Japan does have is effectively a multitude of Crossrails as tube lines link up with private suburban railways."
Point taken about Tokyo, doesn't mean that we should also wait many years before linked up HS1/2 in London, none of us will live that long!
You didn't mention the excellent circular line that links up the terminals you listed!