Heat sesame oil in a pan and sauté ground chicken until fully cooked.
Add tamari, sake (or wine), and grated ginger. Cook until fragrant and slightly reduced.
Let the chicken mixture cool slightly before assembling.
Wet your hands or use plastic wrap to handle rice easily.
Take a scoop of rice, flatten slightly, and add a spoonful of chicken filling.
Gently shape into a triangle or ball, sealing the filling inside.
Wrap with a strip of nori for easy handling and extra flavor.
Serve immediately or wrap and store for later.