Don't share any J-mp3s on WinMX now! There RIAJ will constantly IM you with a warning message saying that you violated artists' rights of their works (also with a URL
http://www.riaj.or.jp/piracy/winmx/), and I just received a dozen from a user named white snake a few moments ago; that person queued all my files that they considered illegal for sharing and can even tell your IP address...