How does one become a Jounin?


It is said in the [wiki](http://naruto.wikia.com/wiki/J%C5%8Dnin) that:

> ...there was mention of a Jōnin Exam in the anime's Kurama Clan Arc.

Does anyone here know what are the stages/steps/missions in order to be a
Jounin?




I think recommendation to become Jōnin ninja are send by villagers and the
hokage has the final decision of a making a one.

I'm not sure about this but I think that the candidate has to create a new
jutsu in order to become a Jōnin (like Kakashi with Chidori, Minato with
Rasengan).

We don't get any other details other than this. Same for the exam. I think
that the created jutsu will be examined.

My answer is based on the anime.

