I am not sure why I am having such a hard time with this. I have looked at several sites and am still not sure... Do I need to buy a ticket for the Bullet train before I leave the U.S. since it is on the J.R. line? Do I need to go buy one as soon as I get to Tokyo? Go to a tourist office? I am traveling solo and get into Haneda after 10pm, and will be in Tokyo for a couple of days before I go to Kyoto for 3 nights. I will be at a small guest house that won't have any "services", so I am not sure of the best way to do this. Thank you in advance for any advice!