We call it Hawaiian Steak! In WWII when there were loads of soldiers in Hawaii, apparently they got so much of it that all of the people already on the island kinda figured out how to work it into their own food. You haven't lived until you've had Spam musubi.
Oh, and we have it at McDonalds and Burger King too! The deluxe breakfast at McDonalds here is sucky. Back home it's got Spam, rice, eggs, and sausage.