The mass media frequently report about a worldwide outbreak of pneumonia related to a new coronavirus.

Please get into the habit of regularly washing your hands (upon returning home, before meals, etc.). If you have any symptoms including a cough, sneezing, a runny nose, or a fever, please ensure that you wear a mask. Anyone who recently travelled abroad should pay special attention to their health in the weeks following their return to Japan, and seek medical advice when feeling unwell.

Pneumonia related to new coronavirus（Ministry of Health, Labour and Welfare）(Japanese)
https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000164708_00001.html 

WHO:Novel Coronavirus (2019-nCoV)
https://www.who.int/emergencies/diseases/novel-coronavirus-2019