Cooking term--Ponzu

Ponzu (ポン酢, Ponzu?), sometimes spelled ponju or ponsu, is a citrus-based sauce commonly used in Japanese cuisine. It is very tart in flavor, with a thin, watery consistency and a light yellow color. Ponzu shōyu or ponzu jōyu (ポン酢醤油) is ponzu sauce with soy sauce (shōyu)