Gyudon is a bowl of rice topped with thinly sliced beef and onion simmered in a sweet soy sauce based sauce.
Gyudon is traditional food and one of the most popular fast foods in Japan. There are three major Gyudon chain restaurants in Japan which are Yoshinoya, Sukiya and Matsuya.
They are open for 24 hours a day so you can enjoy tasty meals for breakfast, lunch, dinner, and midnight snacks.