Yoshinobu Gakuganji in Jujutsu kaisen (JJK): Complete Profile Guide

What’s Next for Yoshinobu gakuganji’s Performance?

■Aftermath of the Shibuya Incident – The Execution of Masamichi Yaga
Following the devastation of the Shibuya Incident, Masamichi Yaga was falsely accused of manipulating Satoru Gojo and Suguru Geto into rebellion. The Jujutsu higher-ups sentenced him to death but offered him a way out:"If you reveal the method to create fully autonomous Cursed Corpses, your life will be spared."

Yaga refused.

Eventually, while escaping imprisonment to save Panda, Yaga was confronted by Gakuganji, who had been assigned to carry out the execution. In the ensuing battle, Gakuganji emerged victorious, and Yaga was fatally wounded.

As he lay dying, Yaga chose to entrust Gakuganji with his deepest secret—the very knowledge he had refused to reveal to the higher-ups. He whispered, “This is my curse upon you,” passing on the technique for creating fully autonomous Cursed Corpses.

This moment shook Gakuganji to his core. Knowing that this secret could threaten the stability of the Jujutsu world if misused, he also understood the immense trust Yaga had placed in him. In a rare display of emotion, he cried out in anguish:

"If you had said this earlier. You could've avoided execution!"

This scene marked a pivotal moment in Gakuganji’s character arc, suggesting that his rigid beliefs may have been challenged by Yaga’s final act of trust.

Source : Jujutsu kaisen Official