Hmm.by japanese you mean the language or the culture? I assume the language if I read the previous posts.
What do I know.. o.o well..there Kana (which is both katakana and hiragana which I have no trouble writing or reading with) and Kanji(which is pretty damn hard to remember...)
Whats your reason for trying to learn the japanese language?
Well it's good to be able to speak when they take over the worl.. i mean ehh.. Yeah, no I think it would be fun to read raws and follow a convo without subs. I'm still a complete newb thou xD