What Restricted items that should not be imported into Korea without proper documentation?

In South Korea, restricted items that require proper documentation for import include firearms and ammunition, certain pharmaceuticals and controlled substances, and products containing endangered species or their derivatives, as per the Convention on International Trade in Endangered Species (CITES). Additionally, food products and agricultural goods may require specific health and safety certifications. Importers must ensure compliance with relevant regulations to avoid penalties or confiscation. Always check with the Korea Customs Service for the most current guidelines and requirements.