This is a general review of our train experience in Tokyo and Japan in general. We Shinkasen'ed it from Osaka USJ to Tokyo Disney Maihama station. We were late by 5 minutes, missed our scheduled Shinkasen and got on the next Shinkasen. My advice is to allow time for familiarising yourself with the different train systems as sometimes you have to queue to ask questions and need time to use google translate.
The ticket inspector was very good and arranged for us to sit together (we bought the most expensive tickets we could find) and we changed to the local line to get to Maihama.
After several days of Disney, we decided to train it to Tokyo from Maihama station. We had 5 people in our party so taxi was not an option and booking a large taxi is almost impossible. The train counter guy did not speak English but gave us a piece of paper that told us how to get to Asakusa as we wanted to visit the temple and surrounding area.
Unfortunately, we did not know there were several train companies operating within Tokyo. So whilst we followed the instructions on the paper, we bought tickets at the wrong ticketing area twice and had to queue up for a refund at the original place where we bought each set of tickets. This was very annoying as we had 5 ppl to get refunds for. Subsequently, we just asked each place we were about to buy tickets at to avoid buying tickets for the wrong line with the wrong train company. (Why cant a rich capitlalist guy just buy all the lines and streamline the system to make it truly efficient?) I mean all the people say how good the Tokyo rail system is but I beg to differ. The trains are frequent and all but the different train companies make ticketing a mess. In a civilised world, we would only need to input the target station into the computer screen and pay once instead of 3 or more separate times, once at each location. Also, it is ridiculous you can't buy the JR rail pass anywhere near the stations.
The amount of information at the platform for each of the train lines also differs. Eg some show the direction the train travels with a tiny arrow while others do not even have such information. This is essential information so you do not get on the train going in the opposite direction you want to go to when you do not know the final stop of the line you are on ie when you only know the next couple of stops!