Ninja Ranks

Genin
Requirements: Pass academy final exam.
Entry level ranked ninjas are called Genin and are basically peon servants. They attain a metal forehead protector after graduating from the academy into a Genin. Much of the missions assigned to Genin are D-ranked, meaning that it's mere labor work and combat is rarely ever involved.

Chuunin
Requirements: Pass Chuunin Exam.
Only exceptional ninjas who are able to pass the Chuunin Exam judged by the Kages are allowed to become Chuunins. Chuunins are often assigned higher level ranked missions. They are easily distinguished by their thick, green vest fancying stylish scroll pouches.

Jounin
Requirements: Pass Jounin Exams.
Elite ninjas showing incredible skills are given a Jounin ranking, meaning that they are eligible for high ranked missions such as assassination. Many Jounins lead a group of three Genins and assists them on their missions, preparing them for the Chuunin Exam. They act as a teacher and guidance counselor.

Special Jounin
Requirements: Failed Jounin Exam
Special Jounin are ninja who, rather than all-around Jounin training, have Jounin-level ability in a single area or skill, much like warrant officers of real-world militaries. They are elite specialists in their areas and are often assigned as subordinates to regular Jounin when their services are needed.

Sannin
Requirements: Appointed by Kage.
Ninjas who possess unmatched strength and skill are ranked right below that of a Kage. A maximum of three Sannin per village are appointed by each Kage. Sannins no longer wear forehead protectors or vests, in order to blend in with common civilians. They are emitted to perform dangerous S-Class missions.

Kage
Requirements: Appointed by council.
Each village has a single Kage, who is the strongest of all ninjas and the political figurehead whom represents the village. Duties include assigning missions, judging the Chuunin and Jounin Exams, acting as a battle strategist, and finally protecting the city.

ANBU
Requirements: ANBU training program.
Elite military squads who enforce vigilance and justice are called ANBU. These guys are incredibly talented and specialize in assassination, investigation, and protection. They are distinguished by their animal mask and silver vest. Think of them as police with ninja skills!

Missing-Nin
Requirements: Piss off your village leaders.
Missing-Nins have either betrayed or abandoned their country in search of ambitions which are often frowned upon. They are often hunted as prey by Hunter-Nins and aren't permitted to enter villages. Missing-Nins are trademarked by the slash cut into their headband across their country's national symbol.