It's absolutely delicious. If you do use it, keep the BBQ flame at medium and slow cook the chicken for about 20 - 30 minutes.
1/2 cup soy sauce
1/2 cup water
1/4 cup sesame oil
2 tablespoons brown sugar (I use 5 of the tiny little Brown Sugar Twin spoonfuls -- the little measuring spoon that comes with the box)
1/2 cup green onion, finely chopped
1 tablespoon garlic, minced
2 tablespoons fresh ginger, grated
1 teaspoon cayenne pepper
Mix all the ingredients together. Take a large bag and fill with 9 or 10 pieces of chicken... pour the marinade into the bag with the chicken. Seal. Set in refrigerator overnight (at least 8 hours but tastes best if you let it sit for 24).