Combine sugar, soy sauce, and water in an 8-quart pot; stir until sugar is dissolved. Turn heat to medium-high; add ginger, garlic, cinnamon, and black pepper and stir.Advertisement
Bring mixture to a boil and add chicken drumettes. Once mixture begins to boil again, reduce heat to medium-low, and partially cover pot with a lid tilted to allow steam to escape. Simmer until chicken is no longer pink in the center and teriyaki sauce is thickened, at least 1 hour.
The drumettes do not need to be thawed first, cooking time will increase by about 15 minutes if frozen.
Keep an eye on the temperature for the first 10 minutes of cooking the chicken. It may need to be adjusted - otherwise pot will boil over.