Health officials in Tokyo have appealed for more than 800 theatregoers to get tested for COVID-19 after a stage production was found to be the source of at least 20 new cases.
The government said it was focusing on a 190-seat theatre in the Shinjuku entertainment district.
The venue staged a play for six days starring mainly up-and-coming boy-band members earlier this month.
All 800 spectators who went to see the performance have been identified as high-risk contacts.
Authorities came to know of the first infection among a cast member on July 6, while subsequent tests found at least 20 related cases.
Tokyo reported 119 new COVID-19 infections on Monday after a period of four days when the daily tally exceeded 200.
Global airlines race to fix A320 jets after Airbus recall
Death toll in Sri Lanka rises to 153 after Cyclone Ditwah
Hong Kong mourns victims of blaze that killed 128 and counting
Vast Russian overnight attack on Ukraine kills two, wounds dozens
Indonesia flood death toll climbs to 303 amid cyclone devastation
