(Provisional Translation)
(http://www.mofa.go.jp/anzen/)
The "Travel advice and Warning" is issued countrywise and has four categories depending on the potential risks on the safety and security for Japanese nationals.
Japanese nationals traveling to and residing in the country or area are advised to stay alert to the security situation.
Japanese nationals are advised to avoid non-essential travel, and to stay alert to the security situation and to take appropriate safety measures should they decide to travel.
All Japanese nationals are urged to avoid all travel regardless of purposes. Japanese residents might be advised to consider the possibility of evacuation or to prepare for evacuation.
All Japanese nationals are urged to evacuate immediately from the country or the area and urged to avoid all travel regardless of purposes.