The highest ninja rank is kage
highest level:LVL20 highest rank:10, you can get more things like warrior, mage, ninja, barber, rouge, healer etc. at trainers, and paladin from artix in swordhaven if you have rank 10 in warrior and healer
The Highest rank is Hokage then comes Jonin(there's a special variation of jonin that's called ANBU or Black Ops that do special missions) then Special Jonins(like medical groups and teachers) then Chunin then Genin and last Ninja academy student
chunin
jonin
Jonin
The highest rank for a skill is 1
The highest rank is Tai Pan
Black Belt
Genin
The black belt is the highest rank in martial arts.
The highest rank in Halo: Reach is Inheritor.
The highest rank you can reach is 46.