Franks Dining Out In Tokyo let's you search restaurants by cuisine or location and has a map to get you to your table.
Tokyo Food Page covers over 1000 restaurants, cheese shops, bakeries, wine bars, pubs and on and on and on.......
Starbucks coffee anyone? What's that? You cant find one! Then use their locator map to get some caffeine into you.
Recipe Source is for those who want to get out the pots and pans and cook for themselves. Loads of recipes from all regions.
About Wasabi gives you the in's and out's and how's and why's of this hot green Japanese condiment.
Kikkoman Soy Sauce has a detailed glossary of Japanese foods and related items. Handy recipes there too.