Outbreaks of swine fever in Japan have been confirmed at six pig farms and other facilities in five prefectures.
The disease, also known as hog cholera, is highly contagious and fatal for hogs. But the virus is not harmful to humans, even if they consume meat from infected animals.
Officials in Aichi Prefecture announced on Wednesday that hogs at two pig farms had tested positive for swine fever.
The agriculture ministry says screenings uncovered the disease in pigs transferred from the farms to four different facilities. They are located in Osaka, Nagano, Shiga and Gifu prefectures.
Hogs at the facilities will be culled in order to prevent further infections.
In Gifu Prefecture, eight swine fever outbreaks have been confirmed since September.
The latest reports bring the number of prefectures with confirmed outbreaks to five prefectures since September in Japan. Before those outbreaks last year, Japan had not seen a case of swine fever in 27 years.
The government is calling on pig farmers nationwide to closely monitor their livestock and swiftly contact authorities if they spot any abnormalities.