Katsu sauce is a popular Japanese condiment typically served with tonkatsu, which is breaded and deep-fried pork cutlet. The sauce has a rich, tangy flavor, combining elements of sweetness and umami. It is made from a blend of ingredients such as soy sauce, ketchup, Worcestershire sauce, and various spices, giving it a unique taste that complements fried dishes. This versatile sauce can also be used with other foods, such as chicken katsu or even as a dipping sauce for vegetables. Its thick consistency and bold flavor make it a favorite in Japanese cuisine, enhancing the overall dining experience.