I have 2 Natural Ash ST-50N model Tokai Strats from Japan, and supposedly they were the only 2 like it made. The finish is really thick high gloss, and prolly some kind of urethane. I don't know if it's true or not, but they came from Mike's in Canada, and are very fine instruments. The pick-ups are kinda weak, so I'm gonna swap out for a set of DeltaTones to go on the one that I'm using. Beautiful guitars, though...
Here's a link to see 'em.
http://members.lycos.co.uk/tokaiguitars/ASH.htm