It depends on your determination and the resources you use.

Fortunately, internet is full of resources for learning Japanese, so make good use of them and you can make possible what other people deem impossible.

Check this (if you want seriously to learn Japanese, don't miss any of this links):
http://ichi2.net/anki
http://en.wikipedia.org/wiki/Remembering_the_Kanji_I
kanji.koohii.com
smart.fm
lang-8.com
www.alljapaneseallthetime.com
https://addons.mozilla.org/en-US/firefox/addon/2471
www.japanesepod101.com