Kobe will forever be my 2nd favourite city in Japan and one I can imagine living in. With just over a million people, it's got a navigable size, a great expat scene, a vibrant Chinatown, more green most other Japanese cities and a lovely harbourside. To be honest, there not many tourist attractions apart from that (though there are many around the city), but downtown Kobe makes a great day trip from Kyoto or Osaka.
It's even more amazing if you consider that the Great Hanshin Earthquake in 1995, most of the city was completely ruined. Today, you can't see any traces of this disaster, except for the part in the harbour that was left as it was after the Earthquake, as a surreal monument of what happened.
The Chinatown is supposed to be one of Japan's biggest ( I have no idea how that's measured), and whenever I visited, it seemed much more vibrant than that of offer cities - maybe because it's still very compact and the food is amazing and cheap.