You can really understand japanese?
Yes. I can't read or write it well though. I can understand parts of it when it's written, but I'm terrible at writing it and reading it.

I can understand it quite well though. B)
Is it a hard language?
I've taken French, Spanish, German, and Japanese, and Japanese was definently the hardest. It's the only one I really have any interest in though (no offence intended to anyone here though.). I don't remember much about French or German, cuz I took them in 3rd and 4th grade (in 10th now), but Spanish I can understand fairly well, but again, I can't read it worth crap nor can I speak or spell it. With all the languages I've studied, I could understand, but I couldn't speak, write, or read them a all.

Just understand it.