Sonan's salamander, Hynobius sonani, is a species of salamander in the Hynobiidae family, endemic to Taiwan, where it occurs in the Central Mountain Range above 2,750 m (9,020 ft). Its natural habitats are from open alpine habitats to shaded moist evergreen forests; it breeds in streams. Adult males are 98–129 mm (3.9–5.1 in) and females are 90–105 mm (3.5–4.1 in) in length. The original specimens used to describe H. sonani (along with H. arisanensis and H. formosanus) were lost in the 1923 Great Kantō earthquake.