Sushida

An online Japanese typing tutor, Sushida. You get a choice to select from 3 sushi courses/levels. Each word you complete you get to move on to the next dish. At the end of the game, it'll provide some stats if you surpassed the course value.

On their main page, they have ghost typing editions where you can compare your skills against other players.

Need to have Japanese input capabilities installed to play.