Read an article on mentsuyu to learn what it is. Mentsuyu is a very useful condiment. You don’t like additives? Make homemade mentsuyu, then!  Ingredients Dashi 150 mL (Check this page to learn how to make dashi.) Soy sauce: 2 tbsp Mirin: 1/2 tbsp Sugar: 1/2 tsp Instructions Put all ingredients in a pot and heat over high until it comes to a boil. Cool down until the liquid becomes warm. If you concentrated type mentsuyu, boil down the liquid to about a third. Store in a jar and keep it in a fridge.