This sounds interesting but I think you need to break the sentence up. It's quite difficult to follow in its present format. It's also rather vague.
"A famous novelist uses a nefarious organization to gather material for his bestsellers. A professor finds out he/she has been spied on and used as a character in a novel about ??. It's not a complementary portrayal?? He/she decides to go to Japan to track down the novelist, but without the organization finding out he/she is on their way."
This pitch probably doesn't make sense for your story, and it's also too long, but I'm trying to indicate where you may need some specifics for the pitch. It should be more specific than anything I've suggested. Nefarious organization is too vague. What kind of material has been gathered and why. If the professor is the book's main character, provide some motivation for the professor's quest. Also, what threat might he/she be under by undertaking this quest.
Having said the professor has to go to Japan I think you need to say what country they set out from to indicate there's a long journey or a culture clash or something interesting about this aspect of the story. Maybe the professor speaks Japanese or is an expert on its history or some such?
Or if the Japan connection isn't one of the most important aspects of the story, you may well want to leave it out.
There's a lot of potential information in your current pitch which will need whittling down to what is really important about this story.
I hope this helps.