Carefully remove the tofu skins from the can. Take the raw edge of each piece (the other side is sealed) and open it carefully like a pillowcase. Repeat until all the tofu skins are open.
In a mixing bowl, combine the rice, sesame oil, rice vinegar, and rice seasoning.
Shape the rice into oval-shaped balls. Stuff the tofu skins with the rice balls. You can dip your fingers in water to keep the rice from sticking to your hands. Feel free to stuff as much rice as you'd like, but leave some room for toppings.
Add toppings of your choice, or serve plain.
