Step 1

Gather all the ingredients. Break the salmon into smaller pieces with chopsticks or a fork. Transfer the hot steamed rice to a large tray or bowl so that you have plenty of room to easily and thoroughly mix it with the other ingredients. Allow the rice to cool slightly as you prepare the other ingredients; you don't want to burn your hands when shaping the onigiri.

Step 2

Cut off the stems of the shiso leaves and roll them up from the stem side. Cut into julienned strips. Loosen them up with your hands and set aside.

Step 3

Cut the myoga ginger (optional) in half lengthwise and then cut it into thin slices.

Step 4

Distribute the shiso and myoga ginger over the hot steamed rice.

Step 5

Distribute the shio kombu, sesame seeds, and cooked salmon over the rice.

Step 6

Using a rice paddle, use a slicing motion to gently mix all the ingredients into the rice. Take care not to mash the rice grains.

Step 7

First, wet both of your palms with a bit of water to prevent the rice from sticking to your hands.

Step 8

Dip 2-3 fingertips into the kosher salt. If you are using table salt, use half the amount as it’s saltier than kosher salt.

Step 9

Then, rub and spread the salt onto your palms.

Step 10

Scoop a handful (about ½ cup) of the slightly cooled but still hot rice mixture into one hand. Bend your other hand slightly to form a "mountain" shape and place it on top of the rice. Gently press the rice with your hands to form it into a triangle.

Step 11

I use three fingers (thumb, index finger, and middle finger) to make a triangle corner. Rotate the rice ball a few times in your bottom hand to gently press and form each triangle corner. Then, turn the rice ball on its side and press it gently to flatten it; repeat on the other side.

Step 12

Your hands should be just firm enough so the onigiri doesn't fall apart. Try to keep the density of the rice ball as airy as possible. You don't want to squeeze the rice too tightly.

Step 13

Use this method when you are serving onigiri for later or packing it for lunch.

Step 14

Prepare a sheet of plastic, about 10 inches by 12 inches. Sprinkle some kosher salt (remember, salt is used here to preserve the rice for a long time) in the middle of the plastic. Scoop the rice mixture and place it in the center of the plastic wrap on top of the salt. Gather the corners of the plastic wrap and twist the plastic a few times to tighten it around the rice. Tip: Onigiri should weigh about 3-4 oz (85-113 g) each. I usually make three 3 oz (85 g) rice balls to fit into my kids' lunch boxes.

Step 15

Form the rice into a triangle shape in the same manner that I described above.

Step 16

Serve the onigiri warm or at room temperature.

Step 17

If you'd like to pack the onigiri for your lunch, keep it cool and consume it within 6 hours. Onigiri (or any rice dish) gets hard when you refrigerate it. The cold air makes the rice dry and hard, which is perfect for fried rice. I don't recommend making onigiri ahead of time. If you really need to, my trick is to wrap the onigiri with thick kitchen towels and store it in the fridge. The onigiri will be cool and safe but should not get cold.