During the time of peace after the Fourth Great Ninja War everything seemed to finally coming together. While the war was coming to an end, Kumogakure was investigating possible ways to genetically modify shinobi like Naruto Uzumaki. The reason behind them wanting to genetically modify shinobi was because they didn’t feel safe with only one person having that much power. The Raikage made sure that this information never left his village, and would genetically modify himself to fease the idea of one village under one rule.

Kumogakure started to calling this movement the Rebirth. The Rebirth was the way to the Kyūkyoku (The Ultimate). Kumogakure was able to accomplish their original goal; creating a serum to replicate the power of Naruto.