that's some knife!!i don't know it there are plenty of knife makers all over the world who can make a knife that is worth $5,000 ..... maybe CHARGE $5,000, but not worth
something like japanese blue steel is much more complex and harder to work with than german high carbon stainless. and with the beating and folding of up to 256 layers on a single knife, and any mistake can ruin the blade, there is a lot of workmanship needed to create such a blade. when done properly, however, you get a knife that is harder, sharper, and cuts waaaaay cleaner than any mass production knife. it is one of those "you have to know about it to tell the difference" type things. i saw on tv a show about biro (some kind of famous chef, i guess) who wanted to throw a sushi/sashimi party at his restaurant and it followed him around as he bought the products and prepared them for this "once in a lifetime" meal. i suppose the diners were impressed with the cut fish but i was horrified!! the wusthof knives he was using simply BUTCHERED the fish, not a neat, clean, shimmering slice of fish to be seen!!
to put it in perspective, there is a greater performance difference between a $5.000 japanese knife vs. a $100 japanese knife (mostly on how sharp you can get the edge and how long it stays sharp) than there is between a $25,000 rolex and a $20 timex digital watch (both tell exactly the same time).