Katsudon

It has become a modern tradition for Japanese students to eat katsudon the night before taking a major test or school entrance exam.

It is also a trope in Japanese police films: that suspects will speak the truth with tears when they have eaten katsudon[1] and are asked, "Did you ever think about how your mother feels about this?"

Even nowadays, the gag of "We must eat katsudon while interrogating" is popular in Japanese films.

[3] Next, into a boiling broth of dashi, soy sauce and onions, the sliced tonkatsu and a beaten egg is cooked.

[5] A variation made with chicken katsu and egg is called oyako katsudon,[6] which is distinguished from oyakodon where the meat in the latter is not fried.