katsu5What is katsu sauce? Katsu (or tonkatsu sauce) is a thick condiment, similar to American BBQ sauce, served with a popular Japanese dish of deep fried pork cutletChicken katsu. Chicken katsu (chicken cutlet (Japanese: チキンカツ, Hepburn: chikinkatsu)), also known as panko chicken or tori katsu (torikatsu (カツ)) is a Japanese dish of fried chicken