Katsu entered Japanese cuisine in the Meiji era (1868–1912) as part of the broader adoption of Western ingredients and techniques. The pork cutlet was transformed from the European schnitzel into something distinctively Japanese through panko, the specific sauce (tonkatsu sauce — a sweet, complex condiment), and the accompaniment of shredded raw cabbage. The dish was thoroughly naturalised within a generation and is now considered foundational Japanese home and restaurant cooking.
Tonkatsu (pork cutlet), chicken katsu, and menchi katsu (minced meat) — a specifically Japanese deep-frying technique producing a dramatically crisper crust than any Western breadcrumb method. The secret is panko: Japanese breadcrumbs made from crustless white bread dried without browning, then ground into large, irregular flakes with high surface area. These flakes fry to a shattering crispness that fine Western breadcrumbs cannot approach.
- **Panko:** Large-flake, dried Japanese breadcrumbs. The flakes are 3–4 times larger than fine Western breadcrumbs. This large surface area creates the maximum number of Maillard points during frying, producing crispness that survives for minutes after the fry rather than softening immediately. - **The standard coating:** Dry the protein completely — any surface moisture produces steam that softens the crust from inside. Dust with flour. Dip in beaten egg. Press firmly into panko — the pressing embeds the panko into the surface rather than leaving it loosely attached. - **Oil temperature:** 170°C for pork (which needs interior cooking time); 175°C for chicken thigh; 180°C for chicken breast (faster cooking time required). - **The rest:** After frying, rest on a rack — never paper. Paper traps steam and softens the crust. A rack allows air circulation on all sides. Decisive moment: The pressing of the panko. Panko loosely attached to the surface will detach in the oil and produce a patchy, uneven crust. Each piece should be pressed firmly on both sides — the palm used to compact the panko into the surface. The applied pressure should leave a slight impression in the panko layer. This takes 15–20 seconds per piece and is not optional. Sensory tests: **Sound:** Correctly fried katsu makes a distinct crackling sound when cut — the crust shatters audibly under the knife. A soft sound indicates insufficient frying temperature or a crust that has softened through steam. **Sight:** The panko should be golden-amber and visually textured — the irregular flakes creating a complex, three-dimensional surface rather than a smooth coating. Any pale areas indicate insufficient oil temperature or too short a fry. **Texture at first bite:** The crust should shatter before the tooth reaches the protein. The crunch is the first sensation; the juiciness of the pork or chicken is the second.
Tsuji