They don't just have a close professional relationship; from what I can gather, Mitsuda'll call up Kato at four in the morning after a drunken night with some chick at a singles bar and ask if there's any more pot because having sex makes him feel like wanting to write music. And Kato'll tell him to come on over and they'll watch Star Wars over a cold one while they talk about how much they hate George Bush, and by the end of it all Mitsuda's already composed the soundtracks for the next three Final Fantasy games, but he's so slammed that Uematsu hooks him up to some kind of alien brainwave machine, gets it out, and slaps his name on it while receiving oral sex from a Rikku cosplayer while Aeris and Tifa do it on his bed and Sephiroth's passed out drunk on the couch.
And there was much rejoicing.
...No, seriously. There REALLY IS much rejoicing.
Dude, wtf?
Seriously, can I have some of what you are smoking?
