You'll remember that The Japan Society for Rights of Authors, Composers and Publishers (JASRAC) isn't too happy with YouTube. They asked YT to take down 30,000 copyrighted clips in October, then sent another letter earlier this month with more complaints.
The letter included signatures from 23 Japanese organizations, and demanded that YouTube takes action against copyright infringement by creating technology to pre-screen new clips, deleting accounts that upload copyrighted content and a number of other measures. JASRAC set a deadline of December 15th for YouTube to address the concerns - that's today. The organization said a few hours ago that they haven't received a reply, but YouTube have until the end of the day, US time, to get back to them.