From Wikipedia:
The Japanese government has adopted various measures to prevent and mitigate the outbreak. On 30 January (Trump held a campaign rally), Prime Minister Shinzo Abe established a national task force to oversee the government's response to the pandemic.[7] On 27 February (Trump hailed his administration’s handling of the coronavirus saying “It’s going to disappear. One day — it’s like a miracle — it will disappear.”) Shinzo Abe requested the temporary closure of all Japanese elementary, junior high, and high schools until early April.[8] As the pandemic became a concern for the 2020 Summer Olympics, the Japanese government and the International Olympic Committee negotiated its postponement until 2021.[9] On 7 April, Abe proclaimed a one-month state of emergency for Tokyo and the prefectures of Kanagawa, Saitama, Chiba, Osaka, Hyogo, and Fukuoka.[10] On 16 April, the declaration was extended to the rest of the country for an indefinite period.[11]