Genin
(下忍; Literally meaning "low ninja", Meaning (Viz) "junior ninja") are the lowest level of ninja and also the ones that display the most difference in power. When they become genin, ninja start to do their bit for their village's economy – being sent on missions that the village gets paid for. They are typically sent either on D-rank missions, which are almost entirely risk-free jobs of manual labour, or, rarely, on C-rank missions, which are a cut above that and begin to verge on real "ninja" work that have a very low possibility of risk to the ninja involved. When Konohagakure was short-handed on upper-level ninja because of the invasion, the village had to occasionally send genin on higher-ranked missions.
Chūnin
Chūnin (中忍; Literally meaning "Middle Ninja", Meaning (Viz) "Journeyman Ninja") are ninja who are qualified to guide other ninja and lead missions. Chūnin have reached a level of maturity and ability that primarily consists of leadership skills and tactical prowess. Genin who do not have the skills to become chūnin are weeded out in the chūnin exams. Some of them, like Iruka Umino and Daikoku Funeno move on to function as Academy teachers and others, like Shikamaru Nara, serve as team leaders in charge of small teams who need to make decisions and utilize the skills of the shinobi under their command to the maximum effect. Chūnin are typically sent on C-rank or B-rank missions.
Special Jōnin
Tokubetsu Jōnin (特別上忍, Tokubetsu Jōnin; English TV "Special Jōnin"; Literally meaning "Special High Ninja"; sometimes known as Tokujō for short) are ninja who, rather than all-around jōnin training, have jōnin-level ability in a specific area or skill, much like warrant officers in real-world militaries. They are elite specialists in their areas and are often assigned as subordinates to regular jōnin when their services are needed.
Jōnin
Jōnin (上忍, Jōnin; Literally meaning "High Ninja", Meaning (Viz) "Elite Ninja") are generally highly-experienced shinobi with great individual skill who serve as military captains. They are often sent on A-rank missions, and experienced jōnin may even be sent on S-rank missions (which are considered to be the greatest difficulty). It is not unusual for jōnin to go on missions alone. Jōnin are generally able to use at least two types of elemental chakra, some genjutsu, and above average taijutsu skills.
ANBU
The ANBU (暗部; English TV "ANBU Black Ops"; Literally meaning "Dark Side"), short for Ansatsu Senjutsu Tokushu Butai (暗殺戦術特殊部隊; Literally meaning "Special Assassination and Tactical Squad"), take orders directly from the Kage, performing special high-level missions, such as assassinations and torture. The ANBU usually work in teams formed to the requirements of the mission, ensuring maximum success. The shinobi in the ANBU are hand-picked by the Kage; chosen for their individual capabilities and special skills. Age, gender, background, or previous rank bear no weight in this decision.
Sannin
The Sannin (伝説の三忍, Densetsu no Sannin; Literally meaning "Legendary Three Ninja") are widely regarded for their great skill and power, each one has the level of being a Kage in their own right; each has been considered for the position of Hokage at different points in time. They possess exemplary ninja abilities.
Kage
A Kage (影; Literally meaning "Shadow") is the leader of one of the five most powerful Hidden Villages and generally are also the most powerful ninja in their respective villages. They are collectively known as the Five Kage (五影, Gokage; Literally meaning "Five Shadows").
(下忍; Literally meaning "low ninja", Meaning (Viz) "junior ninja") are the lowest level of ninja and also the ones that display the most difference in power. When they become genin, ninja start to do their bit for their village's economy – being sent on missions that the village gets paid for. They are typically sent either on D-rank missions, which are almost entirely risk-free jobs of manual labour, or, rarely, on C-rank missions, which are a cut above that and begin to verge on real "ninja" work that have a very low possibility of risk to the ninja involved. When Konohagakure was short-handed on upper-level ninja because of the invasion, the village had to occasionally send genin on higher-ranked missions.
Chūnin
Chūnin (中忍; Literally meaning "Middle Ninja", Meaning (Viz) "Journeyman Ninja") are ninja who are qualified to guide other ninja and lead missions. Chūnin have reached a level of maturity and ability that primarily consists of leadership skills and tactical prowess. Genin who do not have the skills to become chūnin are weeded out in the chūnin exams. Some of them, like Iruka Umino and Daikoku Funeno move on to function as Academy teachers and others, like Shikamaru Nara, serve as team leaders in charge of small teams who need to make decisions and utilize the skills of the shinobi under their command to the maximum effect. Chūnin are typically sent on C-rank or B-rank missions.
Special Jōnin
Tokubetsu Jōnin (特別上忍, Tokubetsu Jōnin; English TV "Special Jōnin"; Literally meaning "Special High Ninja"; sometimes known as Tokujō for short) are ninja who, rather than all-around jōnin training, have jōnin-level ability in a specific area or skill, much like warrant officers in real-world militaries. They are elite specialists in their areas and are often assigned as subordinates to regular jōnin when their services are needed.
Jōnin
Jōnin (上忍, Jōnin; Literally meaning "High Ninja", Meaning (Viz) "Elite Ninja") are generally highly-experienced shinobi with great individual skill who serve as military captains. They are often sent on A-rank missions, and experienced jōnin may even be sent on S-rank missions (which are considered to be the greatest difficulty). It is not unusual for jōnin to go on missions alone. Jōnin are generally able to use at least two types of elemental chakra, some genjutsu, and above average taijutsu skills.
ANBU
The ANBU (暗部; English TV "ANBU Black Ops"; Literally meaning "Dark Side"), short for Ansatsu Senjutsu Tokushu Butai (暗殺戦術特殊部隊; Literally meaning "Special Assassination and Tactical Squad"), take orders directly from the Kage, performing special high-level missions, such as assassinations and torture. The ANBU usually work in teams formed to the requirements of the mission, ensuring maximum success. The shinobi in the ANBU are hand-picked by the Kage; chosen for their individual capabilities and special skills. Age, gender, background, or previous rank bear no weight in this decision.
Sannin
The Sannin (伝説の三忍, Densetsu no Sannin; Literally meaning "Legendary Three Ninja") are widely regarded for their great skill and power, each one has the level of being a Kage in their own right; each has been considered for the position of Hokage at different points in time. They possess exemplary ninja abilities.
Kage
A Kage (影; Literally meaning "Shadow") is the leader of one of the five most powerful Hidden Villages and generally are also the most powerful ninja in their respective villages. They are collectively known as the Five Kage (五影, Gokage; Literally meaning "Five Shadows").
