I got to examine a brand new never been used shigefusa, and I really fell in love with the finish on the knife. I know natural stone finishes look great, but the feel and touch of the finish was so baby smooth; it was like the knife was coated in teflon. It was so nice to the touch. Do natural stones tend to give this "baby smooth" feeling, or do you think the knife was finished with some sort of coating? Scratched the blade with my fingernail but couldn't tell; it didn't seem like it was coated with anything to me. I'm thinking a natural stone would be great to use with my yanagi and usuba if it could decrease the friction between the blade and the food.
From my experience, the finishes left by synthetics aren't really nice. The ones that give me a mirror polish also give me so much friction that it feels like rubber, and water just beads and rolls off the blade as well. I end up preferring hazy finishes because they at least hold onto water better so I can get less drag when I wipe my knife with a wet towel. Not a big deal for knives like gyuto, but super annoying for yanagi and usuaba.