Coronavirus (COVID-19) advice for international travelers

Novel Coronavirus (COVID-19)
https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000164708_00079.html

Coronavirus (COVID-19) advisory information(JNTO)
https://www.japan.travel/en/coronavirus/

Narita Airport Notifications
https://www.narita-airport.jp/en/news/corona