First up is without question, Disney Resort.
If you're an anime lover visit the museum dedicated to Miyazaki’s Anime movies - produced by Studio Ghibli - at Ghibli Museum in Mitaka. Fujiko F Fujio Museum, housing material from works such as Doraemon is another great place to stop by. If thrill and shrill is in your blood, head to Fuji Q Highland, and make a stop at Hakone for some down time (see here for more details). It’ll take you about 2 and a half hours to reach from Tokyo, but it’s the No.1 attraction in Japan. If you think it's too far, then try Tokyo Dome City.