On August 18th, Johnny's & Associates announced that Shonen Ninja's Tamura Kairu (15) has been diagnosed with COVID-19. 

According to the announcement, Tamura had a slight fever on the 17th. He later took the PCR test and learned that he was infected with the virus. The other 21 members have all received negative results. 

Tamura was scheduled to appear on 'Summer Station Live THE FUTURE' on the 18th, but its 4:00 pm performance had been canceled due to the positive diagnosis. In addition, all shows from the 19th to the 21st have been canceled. 

Although contact tracing hasn't been completed, there were possibilities that the Shonen Ninja members would be persons of close contact. As such, they decided to cancel all of their performances in the 'Summer Station Live THE FUTURE.'