Tokyo, Japan

Capital City

Prepare for a grueling commute and a heavy tax burden if you're considering a move to Tokyo. With a population of over 14 million in the city proper, this megacity is the most populous urban area in the world. Bureaucracy is a persistent headache, as the city's governing structure is more akin to a prefecture than a traditional municipality. And the climate is marked by hot, humid summers and occasional cold snaps in winter. But Tokyo remains a global financial and cultural powerhouse, home to 26 of the world's 500 largest companies. This frenetic, densely-packed city is best suited for career-driven urbanites who can navigate its challenges.