Start by measuring all ingredients carefully. This keeps flavors balanced. Japanese-style sauces rely on harmony. Place everything near the stove. This makes cooking calm and organized.

Add soy sauce, mirin, rice vinegar and water to the saucepan. Stir gently to combine. The liquid should look dark and glossy. This forms the base of the omakase sauce.

Add honey or sugar to the pan. Stir until it dissolves completely. This sweetness balances the saltiness. Taste gently at this stage. Adjust sweetness if needed.

Add grated ginger and garlic next. These give warmth and depth. Stir slowly so nothing burns. The smell will become rich and inviting very quickly.

Pour in sesame oil and oyster sauce. Stir well until smooth. These ingredients add umami and richness. The sauce should now look silky and thickening slightly.

Place the pan on low heat. Let the sauce simmer for five minutes. Stir often to avoid sticking. Do not boil hard. Gentle heat keeps flavors clean.

Taste the sauce carefully. Add chili flakes if you want heat. Add a splash of water if too strong. Balance is the heart of this recipe.

Turn off the heat and let the sauce cool. It will thicken slightly as it rests. Cooling also helps flavors settle and blend together.

Pour the cooled sauce into a clean glass jar. Seal tightly. Store in the refrigerator. The flavor improves after a few hours.