I agree and one of these routes might be Sanyo Shinkansen Osaka to Fukuoka via Hiroshima and Shin Kamon Tunnel. Rolling stock is N700S N700-8000s for Osaka Kagoshima services
I also agree, Japan is a beautiful place and the bullet train would be fun to learn how to drive and then race through japan at high speeds. However, it would cause quite a bit of lag and you would have to have a pretty good pc to run it. I can't imagine what the download file would be like unless they make the scenery really crappy. But I do see this coming to the game most likely from a 3rd party company.