Selling baked sweet potatoes in Japan requires a food circulation permit. Selling baked sweet potatoes in Japan requires a food circulation permit. According to the relevant information, I know I want to apply for a food circulation license. Baking sweet potatoes requires a food circulation permit. Selling baked sweet potatoes requires business license, food license, health certificate and health certificate. A copy of the application form, business license or legal person registration certificate's qualification certificate, the identity certificate of the legal representative, the person in charge or the owner, the identity certificate of the food safety administrator, and the health examination certificate of the catering employees are required.