Sakai (Osaka Prefecture) and Seki (Gifu Prefecture) are Japan's principal knife production centres; Sakai specialises in traditional single-bevel kitchen knives; Seki in Western-style double-bevel knives
Japanese kitchen knives represent one of the world's most sophisticated knife cultures — drawing on a millennium of sword-making tradition (samurai sword smiths transitioned to kitchen knife production after the Meiji-era sword ban) to produce blades of extraordinary sharpness, edge retention, and specialisation. While the yanagiba (sashimi knife) is most internationally recognised, the complete Japanese professional kitchen relies on a system of purpose-specific knives: the deba bōchō (出刃包丁) is a thick, single-bevel knife designed for breaking down whole fish — its heavy spine delivers chopping force to vertebrae while the ground face filets cleanly from the bone; the usuba bōchō (薄刃包丁) is the vegetable knife of Kantō cuisine — a thin, flat, single-bevel blade for precise cuts including the katsuramuki continuous paper-thin sheet peel; the nakiri bōchō (菜切り包丁) is the double-bevel vegetable knife used in home kitchens and Kansai professional kitchens; the gyuto (牛刀, literally 'beef knife') is the Japanese adaptation of the French chef's knife — a double-bevel, versatile blade suited to Western-style cooking and now favoured by many international chefs for its superior edge retention over European stainless knives. Single-bevel (kataba) knives are ground on one side only, creating an asymmetry that requires specific left-hand or right-hand versions and a distinct pulling technique; double-bevel (ryoba) knives can be used by either hand. Steel type distinguishes character: white steel (shirogami, highly pure, takes an extreme edge, requires frequent sharpening), blue steel (aogami, vanadium and tungsten added for edge retention), and stainless variants for lower-maintenance applications.
Not flavour-producing in themselves, but the precision of cut directly affects flavour perception — a clean-cut yanagiba preserves cellular integrity in sashimi, preventing oxidative flavour loss that a torn cut accelerates
{"Single-bevel Japanese knives (yanagiba, deba, usuba) require a pulling cut motion — pushing with a single-bevel knife creates lateral force that twists the blade and tears rather than slices","The deba's thickness is not a flaw but a feature — the weight and spine thickness allow controlled percussion cutting through fish vertebrae and poultry joints without damaging the blade","Usuba knives are designed for the katsuramuki technique of rotating a daikon or carrot against the blade to peel a continuous translucent sheet — this requires absolute flatness of the blade face that a curved European knife cannot achieve","Gyuto knives are ground thinner behind the edge than European chef's knives — this geometry requires lighter touch and less steel for the same cutting performance; forcing with Western technique chips the edge","White steel (shirogami) and blue steel (aogami) Japanese knives require active maintenance — they must be oiled after use and dried immediately; they will rust within minutes if left wet"}
{"To identify which side of a single-bevel knife is the flat face, place it edge-down on a flat surface — the flat face should rest flush; the ground side will curve upward from the stone surface","For deba work on fish: make the initial cut through the spine with a single decisive chopping motion using the heavy part of the blade nearest the spine; sawing creates bone fragments that contaminate the flesh","When using an usuba for katsuramuki, clamp the daikon between both hands and rotate steadily against the blade rather than moving the knife — the knife stays still and the vegetable rotates into it","A well-sharpened gyuto should fall through a piece of writing paper with its own weight when held vertically and drawn across the edge — no pressure required; this is the standard for professional sharpness","Maintain knife profiles: the gyuto's belly curve is functional for rocking cuts; over-sharpening the heel can flatten this curve — always maintain the original geometry when working the whetstone"}
{"Using a yanagiba for general cutting tasks including vegetables or bread — its single bevel and thin spine make it susceptible to chipping; it is designed solely for slicing boneless fish","Chopping with a usuba knife — the thin blade is designed for slicing and push-cutting; chopping motion can chip the brittle high-carbon steel edge","Purchasing a left-hand yanagiba for a right-handed chef out of confusion about single-bevel orientation — the flat face must be on the food side (right hand on the right), not the grind side","Honing Japanese knives with a European steel honing rod — the angle and hardness are incompatible; Japanese knives require whetstones and a finer angle (10–15° vs 20–25° for European knives)","Washing Japanese carbon steel knives in the dishwasher — the combination of heat, detergent, and moisture causes immediate and severe oxidation; always hand-wash and dry immediately"}
Japanese Cooking: A Simple Art — Shizuo Tsuji