Mountain View, Calif. -- Mountain View-based Google's YouTube video-sharing service has agreed to post warnings on the Japanese version of its web site that ask users not to upload copyrighted materials, Reuters reported. The Japan Society for Rights of Authors, Composers and Publishers (JASRAC) in October asked YouTube to remove 30,000 of its members' copyrighted clips. YouTube complied, and in December JASRAC followed-up with a letter asking YouTube to implement a copyright filtering system. YouTube executives traveled to Japan to meet with representatives of JASRAC and other copyright groups recently. One solution YouTube has reached with other copyright holders, such as NBC Universal and Warner Music Group, is an agreement allowing users to post copyrighted clips, with copyright holders receiving compensation from YouTube.