Narita San on Wikipedia
Narita San on japan-guide.com
Narita San official website
Looks like you're in luck - I'm guessing you're flying in and out from Narita airport, and from the articles you should be able to catch a 10 minute train from their to Narita station then it's a 15-20 minute walk to Narita San. Otherwise it's a bit of a longer trip from Tokyo.
Good luck!