Ideally, you should visit them all, but if you need to pick just one, here’s a little help for the clueless
You've Got... Tokyo
You’re a big city slicker and you like to dress for it. While you love the energy of a big and dynamic urban center (you can’t get bigger or more dynamic than this town), you like a bit of quiet, so you would love the megalopolis’ calmer corners — you can go from flashy districts like Omotesando to neighborhoods like Daikanyama, which has the flavor of a residential district still hosts boutiques of high-end fashion brands and some of the best coffee in town. This is a city built on the principles of sound design, and everywhere you look — out on the streets, around a small neighborhood, inside a bookstore or café — there’ll be something to inspire you. It is a metropolis on hypermode, and it’s huge, so careful planning needs to be made.
You've Got... Kyoto
You seem to be looking for the more traditional side of Japan — we’re talking Zen gardens, Buddhist temples, Shinto shrines, geisha on parade (if you’re lucky), and stretches of cherry blossom in the winter time. To see what really makes this lovely city unique, you need to put your legs to good use. There are over 1,600 temples in the Kyoto prefecture, and to get viewing spots, you’ll need to walk some distance. Wear comfortable shoes, carry a light load, and make sure your camera battery is full. The more genteel alternative to full-on Tokyo is just under two hours by high-speed train from the Kansai Airport, and four hours by shinkansen or bullet train from Tokyo.
You've Got... Osaka
You might have grown up dazzled by the romance, the nobility and sheer awesome of the samurai culture. Here you can make a pilgrimage to the Osaka Castle — it’s a bit of a walk from the train station, across a moat, up an incline, all the way to where the main tower is. Inside you’ll find an awesome museum with tons of samurai relics and dioramas. When you’re all samurai-d out, central Osaka and the flashing lights of madcap Dotonbori are just a train ride away.
You've Got... Fukuoka
We’re not sure if we’ve got this figured out but we think: you’re a laid-back seafood connoisseur now curious about sushi, sashimi and other Japanese specialties. Also you’re not alone — your best pals are in for the ride, nothing intense, no Excel-type pre-planning. After you’ve eaten your way around the portside market stalls, there’s a modern city to explore.