The ship has been docked at Yokohama Pier and carries 3,700 passengers who face a two-week quarantine. 
Authorities were alerted to invoke the quarantine after an 80-year-old Hong Kong passenger was diagnosed with the 2019-nCoV pneumonia after he had boarded the ship on January 20 and got off at Hong Kong on January 25. 
Passengers reportedly were ordered to stay in the rooms at all times. They are not allowed even on the hallways. 
So far, Japan has reported 86 cases, the highest number outside China. As of Friday (February 7), the total number of cases worldwide exceeded 31,400 with 638 deaths.

41 more cases of new coronavirus found on cruise ship docked in Japan

Forty-one new cases of coronavirus infections were discovered on the cruise ship Diamond Princess, bringing the total number of passengers confirmed with the infection to 61, the Yomiuri Shimbun news agency said, quoting the Health, Labour and Welfare Ministry of Japan.