The number of new coronavirus infection cases in Japan as of Wednesday before noon was 31, bringing the total to 4,490.
The figure includes those found to have the virus in airport quarantine checks, and those who returned to Japan on chartered planes from China.
When 712 cases from the Diamond Princess cruise ship are included, the total number is 5,202. The number of deaths caused by the virus stands at 109, including 11 from the cruise ship.
By prefecture, Tokyo tops the list of infections with 1,195. Osaka comes second with 481, followed by Kanagawa with 297, Chiba with 291, Aichi with 260 and Hyogo with 230.
The list of cases also includes 14 people who returned to Japan from China on chartered planes, and 84 people who are health ministry and quarantine officials or were found to have the virus during arrival checks at airports.
Health ministry officials say that as of Tuesday, 88 patients were in serious condition. Eight of them are from the cruise ship.
A total of 1,242 people, including 622 who were infected in Japan and 620 from the cruise ship, had recovered and left hospital as of Tuesday.