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Yayoi Saito
On January 16, 2020, the first case of the novel coronavirus infection (COVID-19) was identified in Japan. Subsequently, the
number of infection cases increased, leading to the first declaration of the state of emergency in Tokyo, Kanagawa, Saitama,
Chiba, Osaka, Hyogo, and Fukuoka on April 7, 2020. On April 16, 2020, the declaration was extended nationwide. The state of
emergency was lifted on May 14; however, this did not apply to metropolitan areas. On May 25, the state of emergency was lifted
across Japan, after one and a half months of its initial imposition.