Gyudon is a popular Japanese dish consisting of a bowl of rice topped with thinly sliced beef and onions simmered in a mildly sweet sauce made from soy sauce, mirin, and sake. The dish is often garnished with a raw or poached egg, green onions, or pickled ginger, enhancing its flavor and presentation. Originating from the Edo period, Gyudon has become a staple in Japanese cuisine, commonly served in restaurants and fast-food chains. It is enjoyed for its comforting taste and quick preparation, making it a favorite among both locals and visitors seeking a satisfying meal.