Australia's top-ranking Olympic official John Coates arrived in Tokyo on Tuesday, the same day organisers and the International Olympic Committee were set to roll out the third and final edition of their so-called Playbooks.

Coates, the IOC vice president, is the official in charge of overseeing the Tokyo Games.

He has been a controversial figure in Japan, saying the postponed Olympics would go ahead even if the country was under a state of emergency.

Organisers confirmed Coates' arrival from Australia.

Officials last week said he would be quarantined for three days, followed by 11 days of restricted activities during the COVID-19 pandemic.

Coates arrives with Tokyo and other parts of Japan under a state of emergency until June 20, but with reported new cases falling and a slow vaccine rollout finally speeding up.

Less than 5 per cent of Japanese have been fully vaccinated.

The IOC says more that 80 per cent of those staying in the Olympic Village will be fully vaccinated, although it did not provide details how it reached that conclusion.

The Playbooks are COVID-19 rule books for athletes and all others entering Japan to participate in the Olympics.

The second version, published in April, was criticised last month in an editorial by The New England Journal of Medicine that said, among other things, that the Playbooks "are not built on scientifically rigorous risk assessment".

The final version is not expected to deliver major changes, but likely more small details for everyone from athletes to media, broadcasters, and tens of thousands of support staff.

The April version specified:

* All participants will have to pass two COVID-19 tests before leaving their home country. And they will be tested upon arrival in Japan.

* Athletes will be tested daily, as will those in close proximity to athletes.

* Other games participants will be tested daily for the first three days, and then as required.

* All games participants must use dedicated vehicles and avoid public transportation for the first 14 days.

* Games participants will avoid a 14-day quarantine rule for entering Japan, but to do so they must fill out a schedule listing their plans for that period, and also download a tracking app.

Since the second edition was published, organisers have said participants' movement will be monitored by GPS, and that they must sign a pledge to follow the rules.

In addition, athletes must sign a waiver in regard to any harm suffered by COVID-19.