Olympic athletes will be subject to GPS monitoring as will members of the media.
Tokyo 2020 Organising Committee CEO Toshiro Muto said this on Wednesday.
Muto, speaking at a news conference, also said the monitoring system will be used not to track every single movement of the Olympic participants but to retroactively trace them if an issue arises.
The Japanese capital is set to host the once-postponed Tokyo 2020 Olympics from July 23, amid concerns that the global event will burden a medical system already strained by the coronavirus pandemic.
Many Japanese and medical experts oppose staging the Games saying they could trigger a new wave of infections.
Some 80 percent of athletes qualified for the Olympics have already been vaccinated against COVID-19, but the International Olympic Committee is pushing to raise that number with just over a month to go before the start of the Games.
Captains will be the only ones allowed to speak to the referee and discuss a decision during matches at the upcoming European Championship in a bid to facilitate clearer communication.
Substitute Jhon Duran scored two late goals as Aston Villa fought back to salvage a 3-3 home draw with Liverpool on Monday and take a significant step towards a place in the Champions League next season.
Arsenal's Leandro Trossard capitalised on dreadful defending to secure a 1-0 win against Manchester United that saw the Gunners climb back to the top of the Premier League, ensuring the title race will be decided on the final day.
UAE Team Emirates rider Tadej Pogacar has retained his overall lead after Dutchman Olav Kooij won stage nine of the Giro d'Italia on Sunday, pipping Jonathan Milan by half a wheel right at the finish line in a breathless sprint at the end of a 214-km ride from Avezzano to Naples.