Number of air travelers from China in 2020
As part of its response to managing the outbreak of the coronavirus (COVID-19), the Japanese government designated COVID-19 as a quaratinable infectious disease under Quarantine Act on 14 February 2020 and imposed travel restrictions against travelers entering Japan: travelers from specific areas of China and those who are suspected of being infected with COVID-19 were ordered to be quarantined. Also, since 31 January 2020 foreign nationals who were deemed to be COVID-19 patients were denied entry into Japan, pursuant to the Immigration Control and Refugee Recognition Act. As a result of these measures, the number of air travelers from China decreased dramatically since February 2020: the number of air travelers from China saw a change of  +22.6%, -87.9%, -98.5% and -99.98% in during the first four months of 2020 respectively compared to the same months of the previous year (JINTO, 2020).