It looks like there has been problems in more than one cruise ship. One of them docked in San Francisco recently, and the one that the couple I mentioned was on was in Japan.

I don't know how many passengers of the cruise ship that was in Japan were infected. However, the husband of one of the women who tested positive for COVID19 didn't get infected.

Here's the article about the couple, if you haven't seen it:

https://www.oregonlive.com/coronavirus/2020/03/returning-home-after-coronavirus-oregon-woman-diagnosed-in-japan-urges-calm.html