3 ms·only so much space on an island. Japan is pretty crowded as it is, isn't it?by l30n4da5 4y agoonly so much space on an island. Japan is pretty crowded as it is, isn't it?bardworx 4y agoAbout the size of east coast, from Canada to Florida. It’s fairly large. Tokyo is crowded, however.anonAndOn 4y agoNot at all. It's largely a chain of mountains so most people live down on the coasts.