With 3 of out of 13 of its member too sick to perform, Morning Musume was forced to cancel its May 14 concert.
Group members Mizuki Fukumura and Sakura Oda were both diagnosed with influenza. Both were absent from the group's concert on May 13.
Haruka Kudo came down with a fever on May 14. Although not officially diagnosed, officials with the group believe she has become infected with influenza as well.
"Because Haruka Kudo has a high fever, she could not participate in the concert. Meanwhile, Mizuki Fukumura and Sakura Oda are absent due to influenza. We determined that Morning Musume could not put forward its best performance, so today's concert has been cancelled," an official announcement said.
People with tickets to the concert were said to have already been gathering at its venue when staff members announced its cancellation. Ticker holders were told to hold on to their tickets which will be transferred, though specifics are not currently available.
The groups members who have not contracted the disease appear to be separated from the ones who are sick. According to various members' blog posts, members are only keeping in touch through their phones.
Kudo's absence from a scheduled performance comes as a blow to her fans. The idol will be graduating from the group, but will remain with the group through the end of its current tour. There is currently no guarantee that Kudo will participate in a rescheduled concert if it happens.