Who wrote OtherWorld?

Ok, so who wrote this song from FFX?

My freind's, who play guitars want to learn how to play it (XD) and they need to know who wrote it before they can find the tab(?) for it. :p

http://forums.eyesonff.com/showthread.php?s=&threadid=43660

I think there's a link to the tab in that thread too =) *closes this one*