The term futanari (二元) refers to fictional characters who possess both traditionally masculine and feminine anatomical traits. While the motif has existed in Japanese folklore for centuries, its contemporary manifestation in manga, anime, visual novels, and digital art has become a distinct sub‑genre that intersects with erotic fandoms, queer aesthetics, and internet‑driven production models.

The participatory culture surrounding futanari (fan art, fanfiction, doujinshi) illustrates Henry Jenkins’ “convergence culture.” Audiences are not merely consumers but co‑creators, shaping narratives and visual tropes through collective practices.