In a plastic bag, marinate chicken wings (2lb) with sugar (1/2T), rice wine (1T), soy sauce (1.5T), Mirin (1T), rice vinegar (optional, ~1/4 T), garlic powder (optional), and 5 spice powder (optional, 0.5t) for 30 min to 12 hr (overnight in fridge). Pre-heat grill on low heat to ???bake??? wings for 10 min. Turn grill to high and grill chicken wings for ~ 5 min.