KMC is a Japanese company renowned for producing premium-quality trading card sleeves and accessories, widely used by collectors and competitive players around the world. Based in Kyoto, Japan, KMC has built a strong reputation for durability, precision sizing, and clarity—especially popular among players of Magic: The Gathering, Yu-Gi-Oh!, and Pokémon. Their sleeves, such as the Hyper Mat and Perfect Size series, are engineered to protect cards during intense play while maintaining a professional aesthetic.