We are in the Tokyo airport and need to head towards Osaka. After being lost for a minute or two (maybe 10 minutes) we found our way to buy tickets for the bullet train. We walked over and waited for it. Since we purchased assigned seats, we had to find where we were sitting. We were located at cart 4. The train was lovely. Super fast, fixed up nicely and one thing we noticed was that there was a constant flow of police walking inside the train. We traveled what would have taken a car 11 hours, in 2.5 hours. It had AC which was wonderful. You can also just buy a ticket and not get assigned seats. We didn't learn about this till later. There was actually a lady sitting in our seats when we arrived. So she moved.