These are the same files that are available on the official Square Enix website (available for free download @ http://www.playonline.com/ff11us/download/media/install_win.html)
The Japanese game client is still available as well. (Same lousy download server @ http://www.playonline.com/ff11/download/media/install_win.html)
This is primarily for speed issues since their download server sucks.
Both EN and JP clients play on the same servers, so this counts as worthy for nyaa I hope?