I did 2 day trips from Tokyo several years ago -- one to Kyoto and another to Osaka. Not sure which class of bullet train they were on? Both times took the first one there from Tokyo station and the last one back -- made long but great day trips. Though the train was not that memorable... interesting at first, but once you get going you sort of adjust to the speed and except for passing Mt. Fuji the landscape seemed to repeat. Was sort of expecting it to be like my train rides in Europe (i.e. the TGV), but found it less scenic.