I just thought about it because I remembered people saying(to make Tobito theory more believable) that Obito is 4 years older than Kakashi because of his Academy Graduation age(9). Well, Gai graduated at 7, while Kakashi, being a genius he is, at 5; but they are both 30
Is it Kishi's retcon? The same with Asuma/Kurenai(who are 31, but graduated at 9 like Obito, but became chuunins a year later) and some other jounins.
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