Kenjaku initiated the Culling Game in Jujutsu Kaisen as a massive, orchestrated ritual to evolve humanity by merging it with Master Tengen, optimizing cursed energy on a national scale.

Core Motivation

Kenjaku's ancient curiosity drove this chaos: after millennia of body-hopping schemes, he sought humanity's next evolutionary leap. By awakening latent cursed techniques through brutal battles, he generated immense cursed energy while forcing players—sorcerers, cursed users, and civilians—into a deadly battle royale across ten barrier colonies in Japan. This wasn't random violence; every death and fight fueled the barriers needed for Tengen's merger ritual, preparing Japan’s population for transformation into a singular, super-evolved cursed entity.

Strategic Layers

  • Cursed Energy Harvest : Battles produced chaotic cursed energy spikes, essential for the ritual's power.
  • Player Evolution : Forced combat awakened powerful techniques, ensuring only the strongest survived to amplify the merger.
  • Binding Vows : Kenjaku bound himself as "not the game master," making the event unstoppable even if killed, with rules trapping players until near-total elimination.

The game followed the Shibuya Incident, escalating jujutsu terrorism to reshape existence—Kenjaku cared little for winners, only the energy surge and evolution it guaranteed.

Fan Theories and Manga Context

On forums like Reddit's r/Jujutsushi, fans debate timing: Kenjaku waited until post-Shibuya chaos aligned with Tengen's star plasma vessel cycle, avoiding interference from Six Eyes users like Gojo. Some speculate he bluffed about the game's completion to manipulate allies like Choso, as the true merger activates only after all players (except key figures like Sukuna) perish. Manga spoilers note Kenjaku's plan hinges on colony barriers remaining intact, turning the "game" into an irreversible evolution engine.

Bigger Picture Impact

This ritual aimed beyond destruction: merging Tengen with humans creates beings unbound by current limits, fulfilling Kenjaku's god-like vision. As of the latest 2026 wiki updates, the Culling's rules ensure no early escape, with Kogane enforcing lethal penalties.

TL;DR : Kenjaku started the Culling Game to amass cursed energy via mass battles, enabling Tengen's merger with humanity for ultimate evolution.

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