Bhutan, China (mainland) (B), India, Japan (B), Laos, Mongolia (B), Myanmar (B), North Korea (B), Russia (Asian) (B), South Korea, Vietnam.
Vagrant to Cambodia, Philippines, Thailand.
Introduced to Italy (B) (NB), USA (B).
Breeds in eastern Asia, from northern Mongolia, north-eastern through Baikal region to Vitim region in east-central Russia, east to Sakhalin I, and south to Japan, Korea and north-eastern China (eastern Shandong). Winters southern from central Japan and central China western through north-western Thailand and northern Burma to north-eastern India (Assam) and Bhutan.
Records from north-western Bangladesh usually ascribed to Common Quail (Coturnix coturnix), but may actually be this species. May breed in Buthan and Burma. Introduced to Hawaiian Is.
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2010) and decreasing.
Japanese Quail (Coturnix japonica) [XC266701]
by Albert Lastukhin from Khasanskiy rayon, Primorskiy kray, Russian Federation (song)
Japanese Quail (Coturnix japonica) [XC448524]
by Daan Drukker from Shanghai, China (song)
Subspecies
Forms a superspecies with Common Quail (Coturnix coturnix), and possibly also with Stubble Quail (Coturnix pectoralis). Has also been considered a subspecies of Common Quail (Coturnix coturnix), but they are apparently sympatric in Mongolia.
BirdLife International Species Factsheet