Japan's health ministry approved on Friday the use of saliva to conduct PCR tests for people with no coronavirus symptoms.
Last month, the ministry allowed the use of saliva in PCR tests for the coronavirus, in addition to the method of swabbing the nostril. But tests using saliva, which are considered to be easier, were limited to those who had symptoms, like a fever.
NHK has learned that the Tokyo 2020 organizing committee has decided not to hold a torch relay, but will instead use a lantern to carry the Olympic flame across Japan.
Officials close to the matter say the committee decided that the torch relay won't come until it reaches a final conclusion with the International Olympic Committee on whether or not to postpone the Games.
The Spring Grand Sumo Tournament opened on Sunday in Osaka, western Japan, without spectators as part of measures to prevent the spread of the new coronavirus.
Wrestlers and stable masters arrived at the gymnasium by car or taxi. They were told to refrain from using trains, buses and other public transportation to avoid catching the virus.
Officials from the Japan Sumo Association have decided that the spring tournament in Osaka starting on March 8 will be held without any spectators. They took the decision as part of efforts to stop the spread of the new coronavirus.
The members of the association's board meeting have been discussing two options, holding it without any spectators or completely canceling it.
Japan's health ministry says it has to retest 23 passengers who were allowed to leave a new coronavirus-stricken cruise ship in Yokohama port, as the initial testing procedure was incomplete.
All the passengers and crew onboard the Diamond Princess were tested at the start of a 14-day quarantine period around February 5.