Niku Don is a popular Japanese dish that consists of a bowl of rice topped with sliced meat, typically beef or pork. The meat is often cooked in a savory sauce made from soy sauce, mirin, and sugar, giving it a rich flavor. It is commonly garnished with green onions or other vegetables, making it a hearty meal. This dish is part of the broader category of donburi, which refers to rice bowls in Japanese cuisine. Niku Don is enjoyed for its simplicity and satisfying taste, making it a favorite among both locals and visitors to Japan.