I got business Japanese down pretty decently, but my vocab knowledge is complete crap!
I decided to pick up some novels in order to improve my vocab, and just for fun. Read the first few pages of Franny and Zooey (which I've read millions of times in English), and it looks like we've got about 3-5 words per page I don't know. Seems like a good amount! (I actually already owned it in Japanese, but I don't think my version was translated by Murakami.)
Shiokari Pass I'm a little more intimidated by. My colleague said she read it in junior high school, so I thought it couldn't be that hard! I'll prob give up and find an English version..