Add sugar, mirin, ketchup, Worcestershire sauce, chicken bouillon powder, and black pepper, then give it a good mix.
01"23Worcestershire Sauce 2 Tablespoons
Ketchup 2 Tablespoons
Black Pepper appropriate amount
Sugar 0.5 Tablespoon
Chicken Bouillon Powder 0.5 Tablespoon
Mirin 1 Tablespoon