Citrus seasonsed sauce commonly used in Japanese cuisine.
Ponzu is a sauce that is made from the juice of any number of citrus fruits such as lemon, Japanese citron (see "yuzu"), or bitter orange. Ponzu is made by boiling mirin, rice vinegar, bonito flakes and seaweed and then cooled. Once cooled, the liquid is drained to remove the flakes and the citrus juice is added.
Ponzu Shoyu is ponzu mixed with soy sauce and is commonly used in Japanese cuisine as a dipping sauce for gyoza, shabu shabu or sashimi.