's a citrus-based sauce commonly used in Japanese cuisine. It's very tart in flavor, with a thin, watery consistency and a light yellow color. Ponzu shōyu or ponzu jōyu (ポン酢醤油)'s ponzu sauce with soy sauce (shōyu) added, and the mixed product's widely referred to as simply ponzu. Etymology The element pon's ultimately derived from the Portuguese language; an orchard's known as a pomar in this language, giving rise to the Dutch word pons for a ci… (More on Ponzu)