Shinjuku is where it all happens – or seems to, anyway. Fashion trends are born here and watching amateur performers is the order of the day. Kabukicho (a very busy street in Tokyo and the largest red light district in Japan) is where you see all walks of life and soak up the buzz of Tokyo. Nights are dominated by traditional Japanese host and hostess bars, but prices can vary drastically, so travelers beware! Shinjuku Gyoen National Garden is also part of the fun neighborhood

, albeit a more tranquil part.