Isomaru Suisan's "Kaisen Kore Don" - 9 kinds of seafood in a big bowl! Lunch for those days when you want to splurge a little -- "Salmon 3 Colors Don" is also available!
I actually tried Isomaru Suisan's lunch menu, "Kaisen Koubore-don". The ingredients include tuna red meat, negitoro, yellowtail, shrimp, egg, salmon, crab meat, fish roe, and boiled conger eel. There is also a "Salmon tri-color rice bowl" recommended for salmon lovers.