Well as i was browsing the web i noticed in Japan which i knew had rear seat adjustments as well as an option of 6 buttons for factory options . Well i found out what atleast 5 of them are.
From left to right on a 95-2000 LS400
trac/vsc , front headrest drop down , front seat forward/back , rear heated seats , rear seat forward /back.
I find this hilarous as the driver and front passanger do not get heated seats .
Here's a pic