Before and after her first match in the US Open, Japanese tennis star Osaka Naomi wore a face mask bearing the name of a Black woman who was fatally shot by police in the United States in March.

The Grand Slam tournament opened in New York on Monday with various anti-coronavirus measures in place. No spectators are allowed, and players and tournament officials have been tested for the virus.

Japan's Prime Minister Abe Shinzo has worn a face mask at a meeting of the Council on Economic and Fiscal Policy as a precaution against coronavirus infection.

Other members including Cabinet ministers and private-sector representatives also wore masks at the meeting on Tuesday. Their seats were separated more than usual.