Out of the 8,000-plus people travelling to Japan between July 1 to 13 underwent tests, three have reportedly tested positive for Covid-19 after arrival and were immediately isolated.
But in Tokyo, the scenario is far more serious. The city reported its highest number of new Covid-19 cases in almost six months on Wednesday, the Tokyo Metropolitan government said with the Games opening in just over a week. The surging numbers came out on the same day that International Olympic Committee (IOC) President Thomas Bach paid a courtesy call in Tokyo on Japanese Prime Minister Yoshihide Suga.
Suga and Bach have both pledged that the Olympics will be "safe and secure" despite Tokyo and neighbouring prefectures under a national government-imposed state of emergency.
Tokyo reported 1,149 new cases on Wednesday. This was the highest since 1,184 were reported almost six months ago on January 22. It also marked the 25th straight day that cases were higher than they were a week earlier.
Suga asked Bach to ensure that the Olympics will be safe, particularly for the Japanese public, of which fewer than 20 per cent are fully vaccinated.
"To gain the understanding of our people, and also for the success of the Tokyo 2020 Games, it is absolutely necessary that all participants take appropriate actions and measures including countermeasures against the pandemic," Suga told Bach.
"As the host of the games, I do hope that the IOC will make the efforts so that all athletes and stakeholders will fully comply with these measures."
Bach replied: "We'd like to reaffirm all our commitment on the side of the Olympic community to do everything, that we do not bring any risks to the Japanese people."
Bach told Suga that 85 per cent of the athletes and officials living in the Olympic Village on Tokyo Bay will be fully vaccinated. He said almost 100 per cent of IOC members and IOC staff were "vaccinated or immune".
The IOC also says between 70-80 per cent of international medical representatives were vaccinated. The IOC and Tokyo organisers last week banned fans from all venues in Tokyo and three neighbouring prefectures. A few outlying venues will allow some spectators, and fans from abroad were banned month ago.
About 11,000 athletes and tens of thousands of others will enter Japan for the Olympics. The Paralympics will add about 4,400 more athletes. Japan has attributed about 15,000 deaths to Covid-19, a number low by many standards but not as good as most of its Asian neighbors.
The Olympic torch relay has also been pulled from Tokyo streets, with the Tokyo government fearing the relay would draw crowds and circulate the virus. The opening ceremony is July 23 at Tokyo's new 1.4 billion National Stadium. Bach is expected to travel Friday to Hiroshima, and his vice president John Coates to Nagasaki to use those two bombed cities as backdrops for promoting the Tokyo Olympics and the first day of the so-called Olympic Truce.
The Olympic Truce, a tradition from ancient Greece, was revived by a United Nations resolution in 1993. Bach arrived in Tokyo last week and spent the first three days self-isolating in the five-star hotel that the IOC uses for its headquarters in Tokyo.
The IOC is pushing ahead with the Olympics, despite opposition in much of the Japanese medical community, partly because it is dependent for almost 75 per cent of its income on the sale of broadcasting rights.
(Written with PTI inputs)