I used to live in Japan, and my fiancée is Japanese. Being interested in football, it was only natural that I would start watching "my second home nation" play. And to my surprise, their football was incredibly entertaining to watch. It's shaky defensively, there's a bit of mental bottling at times, and there's a serious lack of individualist goalscorers, but the general play is top class, way up there with the best in the world. Some of the moves they pull off as a team, even against the best nations, is just ridiculous to watch.
What makes Japan so unique, is that they've skipped the "basics" as a team. Most "weaker" nations will focus on defending first, and then gradually move over to attack. For Japan, this is not even an option, because their central defenders aren't good enough. They
have to keep the ball. They
have to attack. Otherwise, they are guaranteed to lose