You do have to refrigerate Bachan's Japanese barbecue sauce after you open it.
Bachan's Japanese barbecue sauce can be left out at room temperature without refrigeration if it's sealed.
Although once you open the Bachan's Japanese barbecue sauce it must be refrigerated when not using it within a few hours.
Bachan's Japanese barbecue sauce after opening is okay usually for 2 hours after opening.
Bachan's Japanese barbecue sauce is made without the use of preservatives and is made to be refrigerated after you open it to ensure safety and freshness.
Unopened bottles of Bachan's Japanese barbecue sauce are shelf stable, but refrigeration of Bachan's Japanese barbecue sauce after opening is required to prevent growth of bacteria and extend the shelf life until the best by date on the bottle.
You can also eat Bachan's Japanese barbecue sauce after it's expiration date although it may not taste as good as fresh.