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 benishoga (pickled ginger) and sometimes served with a raw or poached egg on top. Originating in the late 19th century, gyudon has become a staple in Japanese cuisine, commonly found in fast food chains and restaurants. It is appreciated for its comforting flavors and quick preparation, making it a favorite among both locals and tourists.