The International Olympic Committee on Wednesday reassured an anxious Japan that the Tokyo Games will go on as planned in July.
IOC President Thomas Bach said athletes and the host community will be safe.
That's despite growing concerns the events will fuel a spike in COVID-19 cases.
"Together with our Japanese partners and friends, I can only re-emphasize this full commitment of the IOC to organize together safe Olympic and Paralympic games for everybody. To accomplish this, we are now fully focused on the delivery of the Olympic Games."
With just over two months left to go before the Games however, media outlet Nikkei reported earlier on Wednesday that less than a third of medical staff in Tokyo have been vaccinated.
Nikkei reported issues with supply hoarding in large hospitals and a small reserve left for medics, as the country grapples with its latest fourth wave of infections.
Much of Japan is now under a state of emergency until the end of the month, including Tokyo and Osaka.
Okinawa officials said earlier this week it would request its own state of emergency as the caseload reached record highs.
The government hopes to vaccinate most of its population over the age of 65 by the end of July.
To reach that target, Japan would need to administer about 1 million shots a day, which is three times faster than the current pace.
Less than 4% of Japan's 126 million people have received their first dose, the lowest rate among developed nations.