Nori seaweed may quickly absorb moisture, so squeeze out the air from the sealed plastic bag after opening package, and enjoy it immediately.
Depending on the humidity, it lasts about 2-3 weeks when you keep in a cool place.
It lasts about 6 months when you keep in the fridge, and it lasts about 10 months when you keep in the freezer.
Opening package immediately from taking out of the fridge or freezer may cause it getting damp. Leave it until it is warmed up to the room temperature before opening package.