The conjunction in the last few days of a Salon article and a Discovery documentary about the greatest living Japanese knife-maker, Keijiro Doi, and his fiery arts has had chefs buzzing around town. Most all of them fetishize Japanese knives: The Salon article name-checks Thomas Keller, Jean Georges, Eric Ripert, and David Bouley. But the commanding figure in the article is Doi, and it so happens that the only place in America where you can actually buy the 80-year-old blacksmith’s legendary creations is here, at Korin Trading Company downtown. Korin sells a $4,720 yanagi, or sashimi knife, although it is so rare it isn’t even on the company’s Website, as well as a lesser yanagi, a bargain at $720. Korin founder Saori Kawano tells us that Doi inspired her to found the company, the premier Japanese-knife story in America, as a way to honor Japanese knife-smithing.