Yeah, they are! Though since I live in a Hidden Village, the most prominent education is that very same ninja school. Some civilians who are not cut out for the program just goes back to their daily lives with some basic knowledge to for self-defense purposes.
First off, you need to be loyal to your village, and as long as you're healthy and capable of enduring strenuous physical activities, you should be fine!
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Are ninja schools separate from regular school?
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[M-maybe interested in learning ninja-y things since he's already trying to acquire magic skills from Arthur.]
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[ he certainly can help him with that haha. ]