Top Japanese officials say they don't expect a US advisory warning against travel to Japan to affect the Tokyo Olympics - less than two months away.
The US State Department's "Do Not Travel" advisory and guidance for Japan due to increased coronavirus concerns issued on Monday did not mention the Olympics specifically but warned against visiting the country now.
"At present, we can see no particular impact," Olympic Minister Tamayo Marukawa said.
She noted that the advisory did not ban essential travel and the US Olympic & Paralympic Committee had said planned mitigation practices would allow for safe participation of Team USA athletes.
Top Japanese and Olympic officials have pledged the Games will go ahead as planned from July 23 after being postponed in 2020, even as surveys show a majority of Japanese want the Games cancelled or postponed due to worries over coronavirus.
Chief Cabinet Secretary Katsunobu Kato said Japan was in close contact with the US government.
"There is absolutely no change in the United States' support for Japan's decision to hold the Olympics, we believe," Kato said.
In its new guidance, the US Centers for Disease Control and Prevention said travellers should avoid all travel to Japan.
"Because of the current situation in Japan even fully vaccinated travellers may be at risk for getting and spreading COVID-19 variants," it said.
Australia has also advised against travel to Japan due to health risks from COVID-19 and disruptions to global travel.
Japan has avoided the large-scale infections suffered by many other nations, but a fourth wave has triggered states of emergency in Tokyo, the western metropolis of Osaka and other localities across the nation.
The government was leaning towards extending the emergency status - set to end on May 31 in most regions, including Tokyo, according to sources.
Japan's slow vaccination roll-out has increased concerns.
The country has delivered vaccinations to just under 5 per cent of its population, the slowest among the world's larger, rich countries, and has recorded 715,940 infections and 12,308 deaths from the virus.
The US Olympic & Paralympic Committee, which oversees Team USA, said in a statement to Reuters that it has been made aware of the updated State Department advisory on Japan.
"We feel confident that the current mitigation practices in place for athletes and staff by both the USOPC and the Tokyo Organizing Committee, coupled with the testing before travel, on arrival in Japan, and during Games time, will allow for safe participation of Team USA athletes this summer," the statement said.