Welcome to the Japanese New York—only Tokyo is busier, more densely populated, and pricier than its Western counterpart. As immortalized on movies and in music, Tokyo is crazy-hectic and full of personality, from the bright lights of Shinjuku to the Ginza district. Shinjuku also is known for its active nightlife. Just a bit north, the Harajuku district was made famous in the U.S. by Gwen Stefani, who was wowed by the über-stylized, beyond-cutting-edge teen fashion on display. Outside the city center but easily accessible by bullet train are many famous areas, including the Emperor's Palace—a stunning sight, especially when cherry blossoms are in bloom.

If you're going to indulge in Japan's signature cuisine—sushi, of course—be aware that there's nary a California roll to be found in 99 percent of the restaurants. This is authentic sushi from the source, and sometimes it's so fresh it's still alive when it comes to your plate. If you're a real foodie, pilgrimage to famous Tsukiji Market in the early morning to see that great seafood coming off the boats.