Mix all marinade ingredients (water, soy sauce, pear juice, sesame oil, sugar, garlic, ginger, black pepper) in a medium glass bowl.
½ cup water, 4 tbsp soy sauce, 4 tbsp pear juice, 2 tbsp sesame oil, 2 tsp sugar, 2 tsp garlic, 2 tsp ginger, 1 tsp black pepper