Sushi in its modern form (edo-mae style) was developed in Edo (Tokyo) in the early 19th century as a fast food — hand-pressed rice with fresh fish on top, sold from street stalls. The rice vinegar seasoning that defines modern shari was an evolution from earlier fermented rice preparations. The precise balance of the shari is considered as important as the fish in Edo-mae style — a sushi master will spend years perfecting the rice before being considered qualified to handle the fish.
Sushi rice — shari — is freshly cooked Japanese short-grain rice seasoned with a specific rice vinegar mixture while still warm, then cooled to body temperature by fanning. It is not cold rice. It is not rice stored in vinegar. It is a precisely timed process that must be executed correctly or the sushi will fail regardless of the quality of the fish above it. The vinegar dressing changes the starch structure of the rice in ways that cold rice cannot replicate — it must be done while the rice's starch is still gelatinised and receptive.
**The seasoning (awasezu — combined vinegar):** - Rice vinegar, sugar, and salt combined and dissolved while warm. [VERIFY] Tsuji's specific shari ratios. - Never boil the mixture — boiling drives off the volatile esters that give rice vinegar its aroma. - Prepare before the rice is cooked so it is ready to apply immediately. **The timing:** - Apply the seasoning to the rice immediately after removing from the heat and the brief rest. The rice must be hot — above 60°C — when the vinegar mixture is folded in. Hot rice starch is gelatinised and open; cold rice is closed. - Transfer to a hangiri (wooden tub) or wide wooden bowl. Wood absorbs excess moisture without making the rice soggy. - Fan vigorously with a hand fan (uchiwa) while folding with the shamoji. The fanning cools the rice rapidly and creates the characteristic glossy surface — the steam carrying off the volatile acid while leaving the esters behind. - Target temperature: 37°C (body temperature) before use. Rice used warmer sticks too readily; rice used cold loses its pliability. **The fold:** Cut-and-turn, never stir. The goal is to coat every grain with the seasoning mixture without breaking the grains or crushing them. Decisive moment: The moment vinegar mixture meets rice. If the rice is too cool, the starch will not absorb the vinegar — it pools on the surface. If the rice is correctly hot, the vinegar is drawn into the grain by the difference in moisture activity. The sound when vinegar hits hot rice: a brief, gentle sizzle and the immediate release of a complex sweet-acid fragrance — the volatile esters of rice vinegar meeting the hot starch. This smell is the confirmation that the timing is correct. Sensory tests: **Sight:** Finished shari should be glossy — each grain with a sheen. Not wet. Not dry. The grains should be individually distinct but cohere when pressed. **Temperature:** Body temperature. Press a small amount of shari against the inside of the wrist. It should feel neither warm nor cool — exactly the same as skin temperature. This is the target. **Taste:** Subtly sweet-sour-salty simultaneously — no single flavour dominant. The rice should taste complete on its own — good shari eaten alone is enjoyable.
Tsuji