On June 23rd, Johnny's & Associates announced that KAT-TUN member Nakamaru Yuichi has tested positive for COVID-19. 

According to the announcement, Nakamaru had a fever of 38.6°C (101.48°F) on the 22nd, so he conducted the PCR test, which confirmed him positive for the virus. He will be recuperating and monitoring for further symptoms for the time being. 

As for Kamenashi Kazuya and Ueda Tatsuya, they have not been in contact with Nakamaru since the 19th and are not experiencing any symptoms, so they will continue working as scheduled.