Chicken katsudon is a Japanese rice bowl that turns crispy chicken katsu, soft egg, and sweet savory sauce into a comforting home-style meal. This recipe starts with breaded chicken cutlet fried until golden and crisp, then simmered briefly with onion in a sauce made from dashi, soy sauce, mirin, and sugar. The egg is added near the end so it sets softly around the chicken while the sauce soaks lightly into the panko coating without removing all of its texture. Served over warm steamed rice, the dish becomes hearty, flavorful, and balanced with crunchy edges, tender chicken, silky egg, and a rich umami broth. The final bowl works well for lunch or dinner, bringing together classic Japanese comfort food in a simple method that feels satisfying and easy to make at home.