What is the origin of spam musubi, a Hawaiian dish? I love spam musubi...basically spam sushi. It is made with some rice(some people use sushi rice)' a 1/4" slice of spam, and some teriyaki sauce...it is wrapped with a sheet of nori.  This is the basic recipe.

How was this first conceived? I know that the Hawaiians are the biggest consumers of spam (chicken/egg problem? Did the creation of spam musubi help the Hawaians become the second largest consumers (Guam is first) of spam? :) ). There's also a large presence of Japanese on the islands. You can see that the environment is essentially set up for some sort of fusion of the two cultures.

Who was the first to conceive this dish?
Spam became prevalent in the US occupied Pacific islands during World War 2 since fresh meat was difficult to procure at the time.  Since it was a primary food staple, it was incorporated into various dishes, and has remained a popular food.  Spam musubi is just an an extension of this.  Making do with the meat available to create a tasty dish, obviously influenced in this case by Japanese culture.