Shobayaki-Don with Tofu in a sweet sauce and water.
Don is a bowl of rice with something on the top, in this case Shobayaki. It's pork and salat and it taste something like Kebab but with rice instead of bread. Don is very cheap and tasty, particulary with this tofu, hmmmm.
Found it in the campus-cafeteria.
Price: about 500 Y