Gyudon, 牛丼
Gyudon is a Japanese dish in which thinly sliced beef and onions are simmered
in sweet and spicy sauce such as soy sauce and placed on top of a bowl of rice.
The menu on the photo is Gyudon, shijimi kai (fresh water clam) soup and salad at
the restaurant Sykiya which is Gyudon Chain restaurant.