Soy sauce that stays fresher for longerexperience the difference a really good fresh soy sauce can make to a meal with yamasas special fresh soy sauce unlike most soy sauces this sauce has been packaged in an airtight inner bag that collapses in on itself as the sauce is taken out of it this ensures that the sauce does not react with the air and retains its fresh flavour once opened this soy sauce can be stored at room temperature and will stay fresh for 120 days