Our current planned system:
1. The shinobi ranks of Academy Student, Genin, Chunin, Special Jonin (Chunin ranked shinobi whom have a certain Jonin-level ability) and Jonin.
2. An ELO-based shinobi rating that effectively measures the level of skill of the player behind a character, this rating is what will show the difference between e.g. a highly skilled Genin and an average Chunin, or a highly skilled Jonin and an average Jonin.
Having a certain shinobi rating is what will make you eligible for upgrading your shinobi rank by participating in the required exams, participating in said exams to increase your shinobi rank is however a personal choice that is left to you and is in no way mandatory. You have to take account the changes that will come forth once your shinobi rank has increased. For example, a Jonin ranked shinobi will get more difficult missions, will have to lead a Genin team, but will also get a higher pay, these are just a few examples of the type of changes that can occur.
So if your shinobi rating gets high enough, you will get invited to partake in exams for the next rank. If you partake in these exams and get required minimum grade (these exams are both theoretical and practical), you will get assigned your new shinobi rank.
Now to answer this specific topic, although we have currently no plans to add more shinobi ranks, I'm not against the idea.
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