Just to clarify, it's not that they don't list the ingredients (that would be very illegal), but for people who have a food allergy or dietary restriction, it's something that you have to stay vigilant about. Most teriyaki sauces do not contain animal products, for example, but some do. And whether that is just honey, or if it's a meat derivative, it comes down to checking the ingredients list. And if you're not the one preparing a particular dish yourself, it can be difficult to trust. You can go to any restaurant and inform the server of your allergies/restrictions, but that basically boils down to how much you trust someone paid minimum wage or less to care about you.