Upon arrival in Tokyo Narita International airport (or just before you leave!), don't just rush headlong into the city... If you have come long-haul and are tired, there's nothing better than to get your head down at one of the airport hotels for a few hours, and then use Narita as a gentle introduction to Japan/Tokyo. It is a nice small town, which is very walkable, and has many little gems including a temple, local restaurants, shops and backstreet pubs. Prices for food, hotels et al will be much cheaper that Tokyo city, and it allows you to acclimatise in a much less hectic/congested atmosphere. I have always found it a perfect way to take a breather before business in Japan and/or exploring the country on vacation.
