The "Sa-Shi-Su-Se-So" are the fundamental seasonings of Japanese cuisine

 The "Sa-Shi-Su-Se-So" are the fundamental seasonings of Japanese cuisine, representing the traditional order in which they should be added during cooking to ensure optimal flavor absorption.

• Sa (砂糖 - Satō): Sugar
  Added first because its molecules are large; it needs time to penetrate ingredients and tenderize them.

• Shi (塩 - Shio): Salt
  Added next to draw out moisture and flavor.

• Su (酢 - Su): Vinegar
  Added to enhance flavor and aroma. Adding it too early causes the aroma to evaporate.

• Se (醤油 - Seuyu/Shōyu): Soy Sauce
  Added late to preserve its delicate fragrance and deep color, which can be lost if cooked for too long.

• So (味噌 - Miso): Miso Paste
  Added last to maintain its complex aroma and nutritional benefits, which are degraded by prolonged boiling.