Woah what model of Shinkansen did you ride? Every trip I made on the Tokaido line had these wide rows large enough people can fit a luggage standing in front on their feet (and not in green cars). I'm 190cm too and Japan is the only country I've been able to ride trains (or highway buses) with that much room for the legs. Not every bus or train of course but otherwise it's as short as it would get in europe.