Acer diabolicum, the horned maple or devil maple, is a species of maple that is endemic to central and southern Japan. There it is known as カジカエデ, kaji kaede or オニモミジ, oni‑momiji, and is planted as an ornamental. It is occasionally planted as an ornamental outside Japan. It gets its specific epithet and its common names from the two hornlike appearance of the protruding curly stigmas of its flowers, which are retained on its winged seeds.