Japanese Sushi Rice (Shari)
What it is
Not a single cultivar but a preparation: cooked short-grain Japanese rice seasoned with a vinegar-sugar-salt mixture (sushi-zu) to make shari or sumeshi. The base is almost always a Japanese short-grain such as Koshihikari, Hitomebore, Akitakomachi, Haenuki, or older sushi-favored Sasanishiki.
How it's made
Premium short-grain is rinsed thoroughly to remove surface starch, cooked at roughly equal volume of water, rested, then cut (not stirred) with seasoned vinegar while warm and fanned to gloss. The goal is grains that are individually distinct yet cohesive, glossy, body-temperature, and lightly tangy.
Flavor profile
Sweet-sour-savory and warm, with a resilient, slightly sticky bite. The vinegar both flavors and, historically, preserved the fish.
Culinary uses
Nigiri, maki, chirashi, inari. Texture must be firm enough to hold a shape but yield instantly — overworked or cold rice ruins sushi. Sasanishiki and Akitakomachi are traditionally favored by some sushi chefs for grain integrity; Koshihikari for sweetness.
Regional variations
Edomae (Tokyo-style) traditionally used red-vinegar (akazu) seasoning, giving an amber, deeply savory shari distinct from the bright white vinegar style.
Cultural & historical context
Sushi began as narezushi, fermented fish packed in rice that was discarded; the rice-as-edible-vinegared-base of modern sushi emerged in Edo (Tokyo) in the early 19th century as fast food. The rice — not the fish — is what sushi masters say takes the longest to perfect.
Reference notes
Tags: `short-grain`, `preparation`, `Japanese`, `sushi`, `seasoned`. Related ingredients: rice vinegar, kombu, nori, wasabi. Related cuisines: Japanese. Suggested links: Koshihikari, Calrose, Rice Flour. Cannot substitute: long-grain or parboiled — they cannot bind into nigiri; sushi requires short-grain stickiness.