I haven't had a chance to put together the last of my posts for my Dec. 2010 trip. So I will leave you with these photos I took of in Ueno Station. This is a display for the Cassiopeia train. Turns out I could have taken this train all the way to Hokkaido. Cassiopeia Train Wiki entry here.
I've found out this is an e653 series Train also run by JR East. This is the train that ran from Ueno Station to Iwate. It ran along the Joban line and was called the Fresh Hitachi. This line is running again to Iwate.