A jōnin is the leader of a ninja clan. The term is used frequently in the IDW continuity, especially in reference to leadership of the Foot Clan.

The term was first used in conjunction with TMNT in preliminary sketches of Splinter, where he was labeled as "jonin Splinter".

In Mighty Morphin Power Rangers/Teenage Mutant Ninja Turtles, jōnin seems to be the rank of the Foot Elite, below Karai and Shredder.

Noted Jōnin within TMNT



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