Japan's health ministry says it has confirmed the country's fourth case of the new coronavirus.
The ministry said on Sunday that the patient is a male tourist in his 40s from the Chinese city of Wuhan.
Ministry officials say he arrived in Japan on Wednesday and developed a fever the following day.
He reportedly visited a medical institution on Friday for pain in the joints and was hospitalized.
The officials say the man's condition is stable. They quote the man as saying that he didn't visit the seafood market in Wuhan, where many people are believed to have been infected, and he didn't have a fever when he arrived in Japan.
The three earlier cases involve a Chinese resident of Japan who visited Wuhan and two tourists from the city.