[samurai007]

The vast majority of people who go to Japan DO take this route, and teach English. That's how I did it, on the JET Program.

On JET, you don't need Japanese because you team teach in the public schools with Japanese teachers of English. You model the English pronunciation and teach about the normal, everyday usage and grammar, while the JTE uses Japanese if necessary, or translates when needed, and teaches the finer points of grammar. It's a good system, much better than either one teaching alone IMO. And no, it really isn't all that hard when you team teach like that, at least not IMO.