You also need onigiri molds (any shape).

Wash and drain rice 4 to 5 times in a medium sized pot. Cover rice with water and allow it to soak for 20 minutes. Drain.

Place rice in a medium sized pot with 1¼ cups (300ml) water water. Bring to a boil, reduce heat to medium low and cook until water is absorbed, about 10 minutes.

Reduce heat to the lowest setting and continue to cook for another 5 minutes. Turn off heat, remove pot, and let it sit for 10 minutes.

Sprinkle toasted sesame seeds to the pot. Fluff rice with fork.

Wet the onigiri molds and hands with salted water. Fill the mold up to the top with cooked rice. Use lid to compact rice. Remove lid, turn mold over and press down the center to unmold rice.

Wrap edges of onigiri with jyuntoro.