Japanese Sashimi Knife Technique: The Hiki-Zukuri, Usu-Zukuri, and Kaku-Zukuri Cutting Schools

Overview

Sashimi knife technique encompasses a specific vocabulary of cuts that each produce distinct textural, visual, and flavour experiences from the same piece of fish — making the cutting school a genuine culinary decision rather than a purely aesthetic choice. Understanding hiki-zukuri, usu-zukuri, kaku-zukuri, and related cutting techniques provides the technical foundation for informed sashimi presentation and the philosophical understanding of why the same fish can taste meaningfully different depending on how it is sliced. The yanagiba (willow-leaf knife) is the exclusive tool for sashimi cutting — its long, single-bevel blade designed for the pulling motion that produces clean cuts through protein with minimum cellular compression. The three primary sashimi cutting methods each use the yanagiba differently: hiki-zukuri (drawn cut) is the standard technique — the knife is drawn smoothly from heel to tip in a single motion, cutting slices of 5-8mm thickness. The pulling motion produces a clean, smooth cut face with minimal cellular rupture; the slice face is slightly angled from the perpendicular, creating the characteristic lozenge cross-section of standard nigiri and sashimi slices. Usu-zukuri (thin cut) is used for fish with firm, white flesh (flounder, sea bass, snapper) that has delicate flavour overwhelmed by thick slicing — extraordinarily thin, nearly translucent slices (1-2mm) cut at a steep angle to the horizontal, arranged overlapping on the plate to create a flower-petal effect. The thin slicing exposes maximum surface area to seasonings and allows the fish's delicate flavour to register clearly. Kaku-zukuri (square cut) produces neat cubes from dense, fatty fish (tuna, swordfish, yellowtail) — a straight, downward cut producing uniform blocks that emphasise the fish's density and concentrate flavour per bite. Variation: ito-zukuri (thread cut) produces very fine julienne from squid, cuttlefish, and fine-textured fish for preparations where visual impact and delicacy of flavour is prioritised.

Flavour Context

Indirect — the cutting technique does not add flavour but determines how flavour is experienced: thickness affects chewing time and flavour release duration; cut angle affects seasoning surface area; pulling vs pushing affects cellular integrity and moisture retention

Key Principles

{"The yanagiba's pulling motion is functionally non-negotiable for hiki-zukuri — pushing a sashimi knife through protein (Western motion) compresses cells and degrades cut quality; the pull is the technique","Usu-zukuri's extreme thinness requires a sharper angle of the blade to the horizontal — approximately 45-degree incline to create a longer surface on the slice face rather than a pure cross-section","Kaku-zukuri's square cuts require a clean downward motion without pulling — the square face should be uniform; tuna belly's fat distribution appears as a visual pattern in well-cut kaku-zukuri","Slice thickness communicates flavour philosophy: thicker cuts (hiki-zukuri at 8mm) prioritise texture and sustained chewing experience; thinner cuts (usu-zukuri at 2mm) prioritise delicacy and seasoning integration","The yanagiba must remain wet during sashimi service — a dry blade creates drag; professional sashimi chefs keep a moistened cloth for frequent blade wiping","Grain orientation matters: cutting across the grain of fish muscle fibres produces shorter flavour and chewing experience; cutting slightly with the grain produces more complex textural resistance","Sashimi presentation on the plate follows a staggered sequence from the mild (in front, closest to guest) to the intense (at back) — the visual arrangement communicates the intended tasting sequence"}

Pro Tips

{"To develop hiki-zukuri skill: practice on daikon or cucumber at the required thickness — these vegetables provide resistance similar to dense fish flesh and allow observation of cut quality without expensive raw material","Usu-zukuri for flounder (hirame): place the fillet skin-side down, hold the flesh at a shallow angle to the board, draw the yanagiba from tip to heel at approximately 30 degrees from horizontal — the resulting translucent slices should be visible through when held to light","The wrist position in hiki-zukuri: the cutting hand's wrist should flex slightly upward at the beginning of the pull and level at completion — this motion creates the slight convex shape on the slice face that characterises professional sashimi","For tuna kaku-zukuri: chill tuna briefly (10 minutes) to firm the fat before cutting — room-temperature tuna belly is too soft for clean square cuts; light chilling allows precise cube formation","Invest in a dedicated sashimi tasting event using the same fish species cut in three styles (hiki-zukuri, usu-zukuri, and kaku-zukuri) for team education — the flavour and texture differences between cutting methods are most clearly perceived in direct comparison"}

Common Mistakes

{"Using a pushing motion with the yanagiba — the compression produced by pushing rather than pulling creates visible cell rupture, moisture loss from the cut surface, and degraded texture","Attempting usu-zukuri with an insufficiently sharp yanagiba — the extreme thinness required is impossible without absolute sharpness; a blade that catches or drags produces torn, uneven slices","Cutting sashimi from fish that has not been properly tempered to cutting temperature — fish straight from the refrigerator cuts unevenly; 5-10 minutes at room temperature creates optimal cutting temperature","Using uniform thickness for all fish types — different fish textures require different cutting thickness; applying hiki-zukuri thickness to flounder produces over-rich, texturally inappropriate slices for that species","Arranging sashimi without considering viewing angle — sashimi presentation is designed to be viewed from the front; the slight angle of each slice, the shingled arrangement, and the height of the garnish are all designed for a specific viewer position"}

Source

The Sushi Experience — Hiroko Shimbo

Cross-Cuisine Parallels

• {'cuisine': 'French', 'technique': 'Tranchage (slicing) technique for raw and cured fish preparations', 'connection': 'French classical training includes specific knife angles and motion techniques for slicing gravlax and carpaccio — the same principle of cut angle and motion producing different textural and visual outcomes from the same raw product'}
• {'cuisine': 'Italian', 'technique': 'Carpaccio technique — very thin raw beef slicing', 'connection': "Italian carpaccio's extremely thin raw beef slicing parallels usu-zukuri's extreme thinness philosophy — both prioritise maximum surface area exposure and minimal resistance per bite for delicate flavour appreciation"}
• {'cuisine': 'Korean', 'technique': 'Yukhoe (Korean raw beef tartare) precise knife cutting', 'connection': "Korean yukhoe's fine julienne cutting of raw beef shares ito-zukuri's precision fine-cut technique — both produce thin, uniform strands from protein that maximise surface area for seasoning penetration"}