Skyliner
Skyliner is a limited express airport train offering the fastest service between downtown Tokyo and Narita Airport, with a total journey time of 36 minutes*. A fast train offering up to three services per hour, travelling between downtown Tokyo and Narita Airport with only four stops and no changes: Ueno Station, Nippori Station, Narita Airport Terminals 2 & 3, and Narita Airport Terminal 1.
There are lots of trains and they're super frequent. It takes less than an hour from Narita Airport to Ueno, about 45 minutes. The seats are comfy and there's a space for luggage in the train car.