The Diamond Princess was placed in quarantine for two weeks upon arriving in Yokohama, south of Tokyo, on Feb. 3, after a man who disembarked in Hong Kong was diagnosed with the virus. The epidemic originated in mainland China, where more than 1,100 people have now died from the virus.
About 3,700 people are aboard the ship, which usually has a crew of 1,100 and a passenger capacity of 2,670.
The ministry said tests are being conducted for others who are deemed to need them and it will announce the results later.
