Tokyo has long been one of the world's most expensive cities, especially for business travelers, who regale colleagues back home with tales of the $38 room-service breakfast. But for locals and savvy expats, many of the best things in the Japanese capital are, if not free, surprisingly cheap.
If you've got only half a day or so to explore Tokyo, skip the Imperial Palace and Tokyo Tower and head to the Tsukiji fish market--particularly if you're jet-lagged and wide-eyed at 5 a.m. By then, everything from sea urchins to whales to whole tunas the size of third-graders is being chopped and...