Habitat and morphological characteristics of Kuchinoshima-Ushi. A: Kuchinoshima Island located in the Tokara Archipelago, Japan. B: Picture of Kuchinoshima-Ushi used in this study, which kept at Shitara Field, Nagoya University. C: Picture of ancient Japanese cattle pulling a traditional Japanese cart in the Heian Age. This picture scroll, entitled "Heiji-Monogatari-Emaki" and drawn in the 13th century, is a national treasure stored at the Tokyo National Museum. Image: TNM Image Archives http://TnmArchives.jp/.