Japanese Chicken Wings

Preheat the oven to 350 degrees F (175 degrees C).
Place beaten egg in a small bowl. Place flour in a shallow bowl.
Cut wings in half. Dip each piece in egg, then press in flour to coat.
Make sauce: Mix together sugar, vinegar, soy sauce, water, salt, and garlic powder in a medium bowl until combined. Put aside
Bake in the preheated oven for 30 minutes until browned, then pour sauce over wings and cook another 15min. An instant-read thermometer inserted into the centers of wings near the bone should read 165 degrees F (74 degrees C).