Chiba Shun did not take part in training the Eight Gates. He was a ninjutsu-type shinobi, and his taijutsu was only at the Chunin level, so the Eight Gates would not boost him much.
Besides, he did not have time to train the Eight Gates.
Even Shennong's weakened version of the Eight Gates required intense training before one could open the gates.
Chiba Shun simply happily collected the reward for the S-rank Mission.
As the captain, he received half of it—500,000 ryo.
With this money, his previously tight circumstances could finally improve somewhat.
Chiba Shun stayed at the Kumogakure Ninja Academy to train, while the Shinobi World remained broadly at peace.
Only occasional squad-level conflicts broke out.
During one such conflict, a Konoha genius suddenly entered everyone's field of vision.
This was the first news Chiba Shun had heard about Minato Namikaze since leaving Konoha.
At some point, Minato Namikaze had already advanced to Jonin, and his unsealed Jutsu, the Rasengan, had made a name for itself throughout the Shinobi World!
An A-rank unsealed Jutsu—everyone who heard the news felt it was utterly absurd.
If someone had created a C-rank unsealed Jutsu, that would have been one thing. After all, many people studied hand seals, and there was always a chance that one or two of them could simplify a C-rank Jutsu's seals down to one, or even none.
But an A-rank unsealed Jutsu?
And it was said to have required no seals from the moment it was developed!
How were others supposed to live with that?
The Third Raikage also felt that heaven was unfair. Why did geniuses like this only appear in Konoha? Why did Kumogakure not have such talent?
So when Chiba Shun found him and said that he could replicate the Rasengan, he was completely stunned.