S-rank

S-Class is one of the six classifications. It is preceded by A-Rank. It is typically used when classifying jutsu intended for ninja of the Kage level. S-Class jutsu are almost always unique to a single user, and as such are trademark abilities of that user.

There are also S-Class missions, the highest paying and most dangerous type of mission a ninja can go on. These missions are exclusively assigned to highly skilled Jonin or large squads of ninja. S-Class is also a designation given to extremely powerful missing-nin, earning them a place in their village of origin's Bingo Book. Every member of Akatsuki is an S-Class criminal. Fans of the series will sometimes classify powerful ninja who are still loyal to their village as S-Class, such as the Sannin or other Kage-level characters, but this is arbitrary. (Jinchūriki is also S-class)