Prepare the Spam can for use as a mold by opening both ends and washing it thoroughly.

Cut the Spam into 10 slices.

Fry the Spam slices until crispy and drain excess oil.

In a pan, combine soy sauce, mirin, and sugar.

Bring the mixture to a boil over medium-high heat, then reduce to low.

Add the fried Spam slices to the sauce and coat them evenly.

Simmer the Spam in the sauce until the sauce thickens.

Remove the Spam from the pan.

Lay a sheet of nori on a clean surface.

Place the clean Spam can on the lower third of the nori sheet.

Fill the mold (Spam can) with cooked sushi rice and press it flat, about 3/4 inch high.

Sprinkle the rice with furikake seasoning.

Top the rice with a piece of the glazed Spam.

Remove the mold and place it in a bowl of water to keep it clean.

Fold the nori over the Spam and sushi rice.

Roll until completely wrapped and moisten the end of the nori to seal it.

Repeat the process for the remaining Spam slices.