FlyerTalk Forums Expert How-Tos and Guides
 

Map showing Tokyo Station, the Courtyard, and surrounding area - https://www.flyertalk.com/forum/attachment.php?attachmentid=15419&d=1467935271

A few additional tips: (courtesy of 8Tracks):

Arriving via Tokyo Station can be confusing and Google Maps didn't help while inside. Search for the Yaesu South Exit and once outside it will be a short walk to the hotel. (We came out on the Marunouchi side and Google kept directing us to go back inside, but I hadn't yet quite figured out how to navigate through the station without a ticket. We ended up walking around the north end of the station.)

Metro/Subway: The Kyobashi stop on the G/Orange/Ginza line is next door (past grocery/liquor store heading toward Ginza). If you take the escalator down you will find a shop that will sell unlimited 24/48/72 hr. (72hr=1500 Yen) metro passes for those carrying a foreign passport (you will need to show yours). Some metro connections may require walking up to 500 meters, so I'd recommend walking to/from the Takaracho station on the A/Rose/Asakusa if doing so avoids a transfer.