You will need: 1/2 cup Soy Sauce, 1/2 cup Sake, 2 tbsp Mirin, 3 tbsp Brown Sugar, 1 tbsp Honey, 2 clove of Garlic.
Add all the ingredients in a pot and heat until all the sugar melted.
Let it cool. Transfer to a container and store in refrigerator. I left the garlic in the sauce to further infuse the flavor.