One thing I find interesting about Tokyo public transport (especially JR above ground) is that they run such an efficient and high capacity system on what is not gleaming new infrastructure or even seemingly designed for anything near current loads. You can see that from some of the shots of the platform sizes, shelters, etc. Having visited other Asian countries prior to Japan, my expectation was for everything to be shiny and new, so it came as quite a shock the first time, but does make sense.
Did you go to the Pinball Museum in Las Vegas? It is excellent, most games work and you can relive your misspent youth and see if you can get multiballs rolling.
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I've not seen SQ girls since my days at BNE.
They are certainly noticeable everywhere you go!