Some people run it, some cycle it, some simply walk it. Any way you do it, the route around the Imperial Palace has become Tokyo's best-known track.
"It is one of the few places in Tokyo that is unobstructed. You don't really have to cross traffic," says Jason Kendy, director of marketing and communications at Merrill Lynch, and organizer and MC of the annual FIT (Financial Industry in Tokyo) for Charity run around the palace.
The neat, 5.3-km circuit around the palace also makes it an ideal training ground for anything from casual fitness to marathons.