Another eight COVID-19 cases have been recorded by Olympics organisers.
One athlete who is not staying in the Olympic Village is among those who tested positive.
This brings the total positive tests among those linked to the Olympics to 75 since July 1.
According to the organisers, an official in the athletes’ village tested positive and they had 12 close contacts.
On Tuesday, the Czech team announced that after a COVID-19 infection in beach volleyball player Ondrej Perusic was confirmed, beach volleyball trainer Simon Nausch also tested positive.
In addition to the 75 cases registered by Olympics organisers, another four positive tests were recorded by Japan’s prefectures.
The Tokyo Olympic Games are due to officially open on Friday.
