You do not need to watch Jujutsu Kaisen: Execution before starting season 3, but it can be a nice optional warm‑up if you want a recap and early preview material.

What “Execution” Actually Is

  • Jujutsu Kaisen: Execution is a compilation/recap film , not a full new story arc.
  • It bundles a recap of the Shibuya Incident (season 2’s second half) plus the first two episodes of season 3 as a theatrical preview.
  • If you’ve already seen season 2 properly, Execution mostly re‑packages what you know with some cinematic editing and pacing.

Do You Need It For Season 3?

  • Story‑wise, season 3 continues from the end of season 2, so the real requirement is:
    • Season 1 → Movie Jujutsu Kaisen 0 → Season 2 → then Season 3.
  • Guides that include Execution explicitly call it skippable if you’ve seen the show, because it’s recap + first episodes you’ll see anyway when you start season 3.
  • You won’t miss any exclusive canon plot by going straight into season 3 after finishing season 2.

When Execution Is Worth Watching

If you have time, money, or curiosity, Execution can still be fun:

  1. Memory refresher
    • Shibuya is dense and brutal; a tight movie‑length recap can refresh all the key fights and twists before the Culling Game kicks off.
  1. Theatrical “event” vibe
    • Some fans liked seeing Shibuya on a big screen with upgraded sound and atmosphere, plus watching the first two season‑3 episodes early as a shared event.
  1. If you haven’t watched Shibuya in a while
    • If it’s been a year or more since you saw season 2, Execution might help reconnect the dots so all the factions, curses, and rules of the Culling Game feel fresh.

Recommended Watch Order Before Season 3

You can keep it simple and ignore the compilation movies:

  1. Season 1 (episodes 1–24)
  1. Movie: Jujutsu Kaisen 0
  1. Season 2 (Hidden Inventory → Shibuya Incident , episodes 25–47)
  1. Season 3 (The Culling Game / Itadori’s Extermination , etc.)

Execution would sit between step 3 and 4 as a purely optional bonus, not a requirement.

TL;DR: For story and continuity, just finish season 1, JJK 0, and season 2; then you’re fully ready for season 3 without watching Execution at all.

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