Gymnura japonica, the Japanese butterfly ray, is a species of ray in the family Gymnuridae. It is found from Japan to Cambodia.
References Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The Fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p.