Tonkatsu is pork loin breaded with Panko and served with donburi, rice with egg. When you make the dish you give it the final touch with this sauce and you have one of the most addictive dishes that exist not only in Japan, it is because it is in the whole world what can be liked.
Yaki udon , made from fresh udon noodles, like yakisoba, in addition to having a splash of worcester, you can also add a splash of tonkatsu sauce and you will find the meaning of the word "umami"