Step 1

Cook your rice according to package directions and let it cool.

Step 2

Drain the canned tuna, pressing down on the tuna to remove as much liquid as possible.

Step 3

Promptly mix the tuna-mayo in a bowl. Once you've created a smooth mixture, add the soy sauce, and mix again until incorporated. Add pepper to taste and Japanese ichimi spice, if desired.

Step 4

Lightly wet the palms of your hands. Spread two to three pinches of salt on your hands, then take a portion of rice in one palm and form a small well. Fill the hole with 1 tablespoon of the filling, and cover with a small portion of rice.

Step 5

Create a rough ball with the filled onigiri, and then start shaping into a triangle little by little, by leaving one hand flat and forming a 90-degree angle with your other hand. Turn the onigiri oveer three times to properly shape all three sides. Try to imagine the roof of a house when shaping your onigiri.

Step 6

Place the nori sheet so that you can hold the onigiri without your fingers touching the rice. There are several ways to do this: you can choose to cover the onigiri entirely, or just with a strip of nori, or even wrap it as if it were a kimono.