An official connected to the delayed Olympic Games has become the first resident of the Olympic Village to test positive for COVID-19.
The affected official has been placed into a 14-day quarantine, Tokyo 2020 said.
They had not tested positive upon arrival at the airport, but a test taken in the screening process at the Village, located in Harumi, returned a positive result for COVID-19.
The case will concern organizers and the International Olympic Committee, which had promised the Village would be the "safest place" in Tokyo.
"We are making sure to do everything possible to ensure that there is no COVID-19 outbreak," Tokyo 2020 President Seiko Hashimoto said.
"We are sparing no effort.
"We are doing everything we can to prevent any outbreaks.
"If we end up with an outbreak, we will make sure we will have a plan in place to respond."
Tokyo 2020 confirmed that 14 more confirmed new infections in Japan linked to the Games since July 1.