In a large measuring cup or bowl, combine the water, soy sauce, honey, brown sugar, sesame oil, rice vinegar, garlic powder, and ground ginger. Taste and adjust the sauce as needed. Once it has the desired taste, whisk in the cornstarch.
1/2 cup honey, 1/4 cup soy sauce, 1/4 cup water, 2 Tbsp brown sugar, 1 Tbsp sesame oil, 1 Tbsp rice vinegar, 1 tsp garlic powder, 1 tsp ground ginger, 1 1/2 tablespoons cornstarch