Tokai has a pretty unusual system of model designation - the model number is tied into the list price (ie: an LS60 lists for 60,000 yen, an LS75 is 75,000 yen, and so on and so on). So I'm assuming that inflation has pushed up the price of the LS85 to 90,000 yen, thus forcing a change in name also. Same guitar, new number.