Because of the Ninja Academy's previously bloody and brutal graduation system, children from major clans like the Kaguya Clan and Hozuki Clan were kept within their clans for training instead of being sent to the academy.
Of course, this also limited the number of new ninjas their clans could produce.
That was, the total number of genin graduation slots allotted to each ninja clan every year could not exceed the number of Ninja Academy graduates that year.
This was also one of the Third Mizukage's policies for restricting the ninja clans and vigorously developing civilian ninjas.
After all, if clan children who possessed Kekkei Genkai and various secret techniques were allowed to compete fairly against civilian ninjas at the academy, then perhaps eighty percent of the new genin each year would come from ninja clans.
There was nothing to be done about that. In the early stages, having even one additional secret technique or bloodline ability had an enormous impact on a ninja's strength.
Although civilian ninjas might still catch up or even surpass them later on, once the overall proportion of ninjas became unbalanced, clan children, who displayed their advantages earlier, would find it easier to occupy high positions. As a result, the promotion path for civilian ninjas would become increasingly difficult.
That was also the fundamental reason the Third Mizukage used the "Bloody Mist Policy" to force clan children to withdraw from school.
Only in this way could he limit the growth of ninja numbers within the major clans.
And without ninja status, they could not openly accept missions and earn bounties. The more people like that there were, the greater the burden on the clans themselves.
At first, these ninja clans had mocked the Third Mizukage. "Do you think we stop being ninjas just because you refuse