This will depend entirely on the type and brand of teriyaki sauce that you use. If you use my homemade teriyaki sauce recipe then it will be 100% gluten-free. If you choose to use storebought teriyaki sauce make sure to pay close attention to the ingredient label for glutens and allergen warnings. Gluten-free bottles should also include a GF symbol on the front to let you know that it is safe from this allergen.