A lot of people are asking the same questions again and again.
Just put yourself in the position of a Japanese employer! Why should they hire someone for something a Japanese person could do just as well?! Right!
So, what jobs are there that might require something that Japanese people cannot do so well? Or, where would it make sense to have foreign people as well?
Of course, if you work for a Japanese company in your home country you might be lucky and they transfer you to Japan.
Apart from that I know a few foreign people who have made it as voice actor, actor, model, manga artist, journalists and photographers.
There's also translation work, but for that your Japanese ability has to be top, obviously. In most cases the pay isn't great, though.