Usuba Knife Technique Japanese Vegetable Work

Osaka and Edo professional kitchen tradition — developed for kaiseki and high-end vegetable work

The usuba (薄刃, thin blade) is the Japanese professional vegetable knife, ground with a single bevel (kataba) to achieve extreme thinness impossible with double-bevel Western knives. The flat-ground back (ura) creates a slight hollow that prevents suction against cut vegetables. Katsura-muki (rotary peeling) uses the usuba to peel daikon or carrot into a continuous ultra-thin sheet, which is then julienned into needle-thin cuts (ken). This is among the most demanding knife skills in Japanese cuisine — it requires perfect edge geometry, paper-thin blade, and years of practice. The Kanto style usuba has a square tip; Kansai (kamagata) usuba has a curved horn tip.

Technique enables ultra-thin vegetable preparations with clean cut cells, no tearing or bruising