Gray-faced buzzard,サシバ

Endangered Class II (VU) (Japan Ministry of the Environment Red List)

The grey-faced buzzard (Butastur indicus) is an Asian bird of prey. It is typically between 41 and 46 cm in length, making it a medium-sized raptor. It breeds in East Russia, North China, Korea, and Japan, and winters in South-east Asia(Cited from Wikipedia)