AKB48 member and STU48 captain Nana Okada is currently in the hospital after undergoing surgery to treat her vocal cords.
Okada was diagnosed with nodules on her vocal cords. She had a surgical procedure done on August 16 to have them removed.
The idol's condition was not revealed until after the surgery had already occurred. Okada explained that she did not her fans to worry about her.
Okada's activities will be restricted for the immediate future as she recovers from the operation. She will gradually resume normal activities, according to AKB48's management.
AKB48 will be releasing its upcoming single "Sentimental Train" on September 19. Okada placed 5th in the group's 10th World Senbtasu General Election, and will be included in its promotions.