About Hatsukokoro Kumokage -Hatsukokoro works with a wide variety of artisans in their local area, from blacksmiths to knife sharpeners and handle makers. By working with folks who have mastered their craft, each aspect of the knife is carefully curated. Their Kumokage line offers the high-end performance and good looks that Japanese carbon steel is known for, at an incredibly agreeable price. With a little extra care, blue carbon steel gets incredibly sharp and keeps a spectacular edge. The dark wood handle gives it an elegant look, while the octagon shape is exceedingly comfortable to hold while you cut.