Sugar is not only for sweetness. In Japanese cooking it softens salt and builds shine.
Sugar rounds the sharp edge of soy sauce. It also holds water in the meat and helps the sauce turn glossy. Mirin does all three at once.
Japanese simmered dishes add sugar before soy sauce. Sugar molecules are larger and move slower. Salt would block them if it went first.
Sugar softens salt. Sugar holds moisture. Sugar makes the surface shine. Most cooks only notice the first one.
Add sugar first and let it soak in. Then add soy sauce. This order is old and it still works.
I skipped the sugar once to make a dish lighter. The soy sauce tasted harsh all the way through.
| ❌ Symptom | 🔍 Cause | 💡 Solution |
|---|---|---|
| The soy sauce tastes harsh | No sugar to round it | Add a small spoon of sugar or mirin |
| The simmered meat is dry | Sugar went in too late | Add sugar before the soy sauce |
| The sauce has no shine | Not enough sugar to glaze | Add mirin and reduce two more minutes |
