US president Donald Trump fully supports a delay in the Tokyo Olympics agreed between Japan and the international Olympic panel, a Japanese government spokesman said on Wednesday, citing comments made to Prime Minister Shinzo Abe in a telephone call.

"President Trump repeatedly said the postponement is an excellent and wise decision," Deputy Chief Cabinet Secretary Akihiro Nishimura told a news briefing. "There was a remark that he supports Prime Minister Abe's stance 100 per cent."

On Tuesday, the Tokyo Games were postponed to 2021, for the first time in the event's 124-year modern history, because of the coronavirus pandemic.