During this summers trip to Japan we got JR passes for one week and took two Shinkansen rides. These trips both originated at Tokyo Station. I've always found the Shinkansen part of the station to be more like visiting an airport, but back in the day when flying was still fun. Tokyo station is the terminal for the Tokaido, Tohoku, Nagano, and Joetsu Shinkansen lines so it's quite busy.
The displays are in both Japanese and English and include graphics of the trains.
This display is just for the Tohoku, Nagano, and Joetsu Shinkansen lines. The Tokaido Shinkansen line uses different tracks and has it's own similar display.
Someones post on the JNS forum led me to this story about the cleaning of the Shinkansen trains.
We were enjoying drinks, a smooth and fast ride, and way more leg room. The Shinkansen is still my favorite way to travel.