Easy??? Are you kidding me. I have been studying it for 9 months now,I get 14 hours of Japanese lessons a week, without making the exercises and I'm really having a hard time. Seriously all the honorific/humble words, non-polite/polite speech, passive, suffering passive, causative, causative-passive, quoted requests/questions. And that list isn't even complete...
Seriously if you think it's an easy language then I really envy you.