About Nenox S-Type Nenohi applies the skills and techniques of traditional Japanese knife crafting to Western style knives, with great attention to detail in each step of the production process. Nenox knives are made with a confidential blend of high carbon stain resistant steel, which undergoes a sub-zero manufacturing process to ensure a durable edge. Much of the process is done by hand, and all of the knives are hand inspected before they are shipped. From the high carbon stainless blades to the ergonomic design and luxurious handle, these knives are a testament to quality. Nenohi’s Nenox knives are loved and admired by chefs worldwide.