1Cut the chicken breast into bite-sized pieces.
In a bowl, mix the soy sauce, mirin, sugar, and sake until the sugar is dissolved.
Heat the vegetable oil in a pan over medium-high heat.
Add the chicken pieces to the pan and cook until they are browned on all sides.
Add the ginger and garlic to the pan and cook for another minute.
Pour the sauce mixture over the chicken and bring to a boil.
Reduce the heat and let it simmer until the sauce thickens and the chicken is cooked through.
Serve the Chicken Teriyaki over rice or with vegetables.