The H7 bird flu virus has been detected at a quail farm in Toyohashi, Aichi Prefecture, the prefectural government and the farm ministry said Friday.
As the infected quails have not died, the virus "may be of attenuated virulence," the Agriculture, Forestry and Fisheries Ministry and the local government said, suggesting it is unlikely the infection will spread further.
Although it is rare for humans to catch the H7 virus, those who are in contact with the infected birds may show symptoms, such as in the respiratory system.