Tokubetsu Jōnin

are ninja who, rather than all-around Jonin training, have Jonin-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 Jonin when their services are needed. One example of a Tokubetsu Jonin would be Ibiki Morino, whose unique ability to completely understand the workings of the human mind makes him a Jonin-level interrogation expert