Japan — Japanese knife production concentrates in three regions: Sakai (Osaka Prefecture) — the oldest and most respected centre, producing single-bevel knives for the professional market since the 7th century; Seki (Gifu Prefecture) — known for double-bevel and all-purpose knives; Takefu (Fukui Prefecture, now Echizen city) — high-end artisan producers using traditional forge-welding techniques.
Japanese professional knife culture employs a range of specialised single-bevel and double-bevel knives, each designed for a specific cutting task with a geometry precisely calibrated to that task. Understanding the taxonomy is essential for understanding how Japanese professional cooking achieves its cutting precision. The primary forms: Yanagiba (柳刃包丁) — long (240–330mm), thin sashimi knife for slicing raw fish in a single pull-cut; Deba (出刃包丁) — heavy, thick-spined fish butchery knife for breaking down whole fish; Usuba (薄刃包丁) — single-bevel vegetable knife for katsuramuki (sheet cutting) and precision vegetable work; Nakiri (菜切り包丁) — double-bevel vegetable cleaver; Gyuto (牛刀, 'beef knife') — Japanese interpretation of the Western chef's knife; Santoku (三徳包丁, 'three virtues') — all-purpose home cook's knife; Petty — small utility knife.
The choice of knife affects the flavour and texture of the food: a yanagiba at optimal sharpness makes a single pulling cut through tuna that leaves the protein's cells intact, producing sashimi with a clean, bright flavour and a slightly resistant texture. A dull knife or a push-cut through the same fish bruises the cells, releasing moisture and producing a wetter, less vivid flavour. In Japanese cuisine, the knife is not just a tool but a direct contributor to the food's sensory qualities — sharpness, angle, and technique are flavour variables.
Single-bevel knives (yanagiba, deba, usuba, kiritsuke): ground on one side only, with a hollow (ura-oshi) on the flat back to reduce suction and food adhesion. These require higher skill to sharpen but produce cleaner cuts — the angled bevel deflects the cut food away from the blade path. Double-bevel (nakiri, gyuto, santoku): ground on both sides symmetrically, easier to sharpen and maintain, suitable for multi-directional cutting. The steel hardness: Japanese kitchen knives typically run 60–67 HRC Rockwell (vs 56–58 for Western knives), allowing a thinner, sharper edge but requiring more careful maintenance and being more susceptible to chipping on bones.
The kiritsuke (切り付け包丁) is the single knife that combines yanagiba and usuba functions — a long, pointed knife with a flat spine that can both sashimi-slice and perform katsuramuki. It is traditionally used only by the head chef (itamae) in a Japanese kitchen, as a symbol of seniority. The knife selection for a Western professional wanting to incorporate Japanese knife work: a 270mm yanagiba for fish/sashimi; a 210mm double-bevel gyuto for general work; a 165mm nakiri for vegetables. This three-knife kit covers 95% of professional Japanese-influenced preparation.
Using a yanagiba for anything other than pulling cuts — pushing or rocking destroys the thin single-bevel edge. Using a gyuto on whole fish with bones — the thinner, harder Japanese steel chips against bone in ways Western chef's knives resist. Treating nakiri as a cleaver — nakiri is for slicing and chopping; it has no mass for breaking down large vegetables.
Japanese Cooking: A Simple Art — Shizuo Tsuji; The Japanese Kitchen — Hiroko Shimbo