MJ Studio (MJ工作室) is a Chinese designer toy brand known for its flagship IP Emma, a woodland fairy character set in a magical Secret Forest universe. The brand produces blind box figures, vinyl plush, and BJD collectibles built around intricate seasonal aesthetics and an expanding cast of characters. MJ Studio releases themed series across multiple formats, with each collection developing the Secret Forest narrative through distinct character roles and visual motifs. The brand distributes through collectible toy retailers and online platforms, targeting collectors drawn to character-driven storytelling and detailed craft.