For some time now, we've noticed that the Japanese song list for Platinum machines are missing a lot of entries e.g. リンダリンダ should be in the pdf but it isn't.
Based on a hint, we looked into the downloadable 100MB+ optional update file from their site. Long story short, we were able to extract the raw Japanese song list and upload it to Google Docs.
We'll slowly add the numbers to the database in the coming months.