Wash and cook rice in a rice cooker. Cut the nori into 3 inch wide sheets.
Open a can of spam and slice it one inch in length. Usually comes out to 9-10 slices.
Fry the spam on a pan over medium heat. 3-4 minutes on one side before flipping it. (Add the teriyaki sauce to the pan and let it cook for 1-2 minutes then flip it over and cook for another minute.)
Place nori down and the musubi mold on top. Place a scoop of cooked rice in the musubi mold. Press down on the rice with the mold handle. Then add the cooked spam and push out the contents with the musubi handle while pushing the rectangle mold up and over the contents.
Wet the ends of the nori with water and fold it towards the middle.
Serve hot or wrap it in plastic wrap to have an on go lunch.