(Provisional Translation)
(http://www.mofa.go.jp/anzen/)
MOFA of Japan
Consular Affairs Bureau
Level 1, Exercise caution; Regarding a particular infectious disease, Japanese nationals traveling to and residing in the country/area are advised to stay alert to the situation.
Level 2, Avoid Non-essential Travel; Regarding a particular infectious disease, Japanese nationals are advised to avoid non-essential travel to the country/area, and to stay alert to the situation and take appropriate safety measures should they decide to travel.
Level 3, Avoid All Travel; Regarding a particular infectious disease, Japanese nationals are urged to avoid all travel to the country/area regardless of the purpose. Japanese residents in the country/area may be advised to consider or prepare for the evacuation.
Level 4, Evacuate and Avoid All Travel; Regarding a particular infectious disease, Japanese nationals are urged to evacuate immediately from the country/area and avoid all travel regardless of the purpose.