Combine soy sauce, sake, oil, ginger, and garlic in a bowl and whisk to combine. Add chicken pieces and mix well with the marinade. Marinate at room temperature for 15 to 20 minutes.
2
Heat oil in a large saucepan to 350 degrees F (175 degrees C).
3
Combine flour and cornstarch on a plate. Coat marinated chicken with flour-cornstarch mixture.
