A free program for Android, by RenderApps.

Exercise your Japanese knowledge and expand your existing vocabulary with the Japanese! Word Search mobile game. It combines the challenge of word search puzzles and the ability to practice learning a new language. If you are a huge fan of word search games on newspapers, then you should try out this digital take of that!

The game features more than a hundred thousand Japanese words you can find, and it is designed not to repeat words as much as possible. There are nine levels of difficulty, so if you think you are already a pro at one level, then you can try out the next one.