Chunin (Meaning Middle Ninja, Viz Meaning Journeyman Ninja) are ninja who are qualified to watch over and guide other ninja. Chunin have reached a level of maturity that primarily consists of leadership skills and tactical prowess. This is because the genin who don't have the skills to become chunin are weeded out in testing. Some of them, like Iruka Umino and Mizuki, 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. Chunin are typically sent on C-Rank or B-Rank missions.