Look I know the obvious answer to this sounds like "Oricon."
But I'm wondering what a good source is to track charting & sales once songs fall out of the weekly top 50 (or don't make it there in the first place), which is all the website displays publicly. Seems you have to pay to get full access. To anyone who's provided Oricon charting info, what source do you use? Or will I just have to leave it up to people who've paid?