So, you want to learn Japanese...
[link|http://www-unix.oit.umass.edu/~thoureau/japanese.html|Gee, this guy seems to have the long and short of it.]
I can tell you, from personal experience, he's 100% right.
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche