According to the Wikipedia Japanese ,
In Japan, it is seen in Honshu, Kyushu and Okinawa at the time of spring and autumn migration as a passage bird, but the number is small. There are also individuals that overwinter. Breed mainly in the region from the southern part of Russia to Central Asia, but also breeding locally in the northeastern part of China. In winter, it winter over central Africa to the south, India, Southeast Asia, Australia etc.
日本では、旅鳥として春と秋の渡りの時期に本州、九州、沖縄で見られるが数は少ない。
越冬する個体もいる。