actually they don't sell gyoza but come to think of it they should.
they don's sell ramen too but the Korean stall has something like that.
anyway, Oyakodon... let me refer to wikipedia for the more decent description:
Oyakodon (親子丼), literally "parent-and-child donburi", is a donburi, or Japanese rice bowl dish, in which chicken, egg, sliced scallion (or sometimes regular onions), and other ingredients are all simmered together in a kind of soup which is made with soy sauce and stock, and then served on top of a large bowl of rice. The name of the dish is a poetic reflection of the fact that both chicken and egg are used in the dish.
at a Japanese restaurant, it'll usually looks better. :-)