In Jujutsu Kaisen, Masamichi Yaga is killed because the jujutsu higher‑ups see his cursed technique and his loyalties as a political threat, not just a disciplinary issue.

Core reason he was killed

  • Yaga holds the unique secret of creating fully self‑aware, independent Cursed Corpses like Panda, something no other sorcerer can replicate.
  • The higher‑ups fear that this technique could massively shift the balance of power in jujutsu society, either by replacing sorcerers with mass‑produced Cursed Corpses or by falling into “the wrong hands.”
  • Instead of protecting that knowledge through cooperation, the authorities decide it is safer to eliminate the one man who fully understands it and seize control of the method themselves.

In story terms, Yaga dies not because he is weak or incompetent, but because people in power fear what he represents and what his knowledge could change.

Official sentence after Shibuya

  • After the Shibuya Incident, the higher‑ups formally sentence Yaga to death, using the chaos and losses as justification to target anyone aligned with Gojo and seen as “unsafe.”
  • They blame Gojo for the catastrophe but cannot punish him directly at that point, so they go after his circle, including Yaga, who has always silently supported Gojo’s rebellious stance toward the old system.
  • Yaga, as Tokyo Jujutsu High’s principal, is accused of “failure” in supervision and security, which becomes the official pretext to move ahead with his execution order.

The confrontation and his final choice

  • Gakuganji is sent to carry out the sentence and gives Yaga a clear ultimatum: reveal the method for creating autonomous Cursed Corpses like Panda, or die.
  • Yaga refuses to hand his technique over for exploitation, choosing to fight and accepting death rather than let his creation method become a tool of abuse or mass production under corrupt leadership.
  • In his final moments, he does share the formula, but he frames it as a “curse” passed onto Gakuganji, burdening him with the ethical weight of that knowledge, which makes his death especially tragic and symbolic.

Political and hidden layers (manga and fan discussion)

  • Many readers interpret his death as fundamentally political: he is close to Gojo, sympathetic to reform, and possesses a game‑changing technique, so removing him is a way to keep the old order safe from change.
  • Later manga developments suggest Kenjaku has heavy influence or control over the higher‑ups, so it is very plausible within the story that Yaga’s execution aligns with Kenjaku’s larger plan to remove Gojo’s allies and consolidate power.
  • Forum debates often highlight how, if the higher‑ups really only wanted his technique, they could have kept him alive as a “factory,” which reinforces the idea that fear and control—not practicality—drove the decision to kill him.

Emotion and tragedy in Yaga’s death

  • Yaga’s death hits hard because he is portrayed as a fundamentally caring teacher and father‑figure, especially through his relationship with Panda, turning his execution into a personal loss rather than just a plot event.
  • His choice to protect the spirit behind his technique—treating it as a burden and a “curse” he refuses to let the corrupt system weaponize—makes his last stand feel like an act of quiet rebellion and love rather than defeat.

In one line: Yaga was killed because the higher‑ups (likely nudged by Kenjaku) feared his independent Cursed Corpse technique and his ties to Gojo, so they used Shibuya as an excuse to execute him rather than let his power reshape jujutsu society.

Information gathered from public forums or data available on the internet and portrayed here.