Katsudon is a popular donburi dish in Japan. It consists of a deep-fried breaded pork cutlet, called tonkatsu, served on a bed of steamed rice and topped with a sweet and savory sauce and beaten eggs. The dish is then simmered until the eggs are cooked and the sauce thickens. Katsudon is often garnished with green onions and served with a side of miso soup. The combination of crispy tonkatsu, fluffy rice, and flavorful sauce makes this dish a favorite among many Japanese people.