The soup at the side is actually miso.
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. :-)