Although sometimes thought to be of Chinese origin, the species is in fact native to Taiwan and islands in southern Japan including Kuroshima, Suwanosejima and the Uji Islands.
Aínda que se pensa que é de orixe chinesa, a especie é, de feito, nativa das illas do sur do Xapón, incluíndo Kuroshima, Suwanosejima e as Illas Uji.