Regardless of who invented sushi, as a result of using vinegar in making sushi, and the advancement in technology of brewing vinegar, sushi which was acidulated with vinegar without waiting for fermentation, so-called 'Haya-zushi,' came into being.
誰が発明したかはともかく、寿司に酢が使われ、酢の醸造技術も進んできて、いよいよ発酵を待たずに酢で酸味を得て食する寿司、「早寿司」が誕生することになる。