Mirin. Mirin, both opened and unopened, has an indefinite shelf life when stored in the refrigerator but starts to lose quality after about two months. Store mirin in its original bottle with the cap tightly sealed for best results.

Can you use mirin past expiration date?

Similar to any other food items, mirin does go bad, if not stored properly. However, you can use it even after passing its best before date as long as it is refrigerated. Generally, both opened, and unopened mirin will last you for a really long time when stored in a cool place, away from sunlight.

Does mirin need to be refrigerated after opening?

Mirin-like condiment is cheaper because it avoids certain alcohol taxes. It claims to have the same taste as hon mirin and can enhance the flavors and texture. It needs to be refrigerated after opening and used within 3 months.