Demon Slayer has taken the world by storm with its 2025 blockbuster, titled 'Demon Slayer: Infinity Castle Part 1 – Akaza's Return.' This movie kicked off the final trilogy in the series, and we're already eagerly awaiting the release of the second part, which we expect to be released sometime in 2027. Infinity Castle Part 2 will be a rollercoaster ride, but the real climax is expected in the third and final movie, which will see the clash with Muzan finally take place.
Muzan is known as the Demon King, and although he stands as the strongest villain in the entire story at the moment, the final film will introduce a new villain even stronger – Demon King Tanjiro. Tanjiro's Demon King transformation would have eclipsed both Muzan and Yoriichi in terms of power, if successful.
Demon Slayer's final movie release will officially reveal that Demon King Tanjiro is stronger than Muzan
Demon Slayer is a story by Koyoharu Gotouge, and immediately after debuting in Weekly Shonen Jump Issue #11 on February 15, 2016, we were shown the story's final antagonist, Muzan Kibutsuji, a powerful demon who massacred Tanjiro's family in his absence. Muzan would not fully appear until Demon Slayer Chapter 13, which was released on May 16, 2016, in WSJ Issue #24. Immediately after, he quickly made himself appear as a powerful enemy, known as the Demon King and Progenitor of all Demons, and one that would not be easy to defeat.
Despite Muzan's unparalleled strength, the Demon Slayer Corps was determined to defeat him, which is what led to the Infinity Castle invasion at the end of Season 4, and its debut in Demon Slayer: Infinity Castle 2025. Due to the surprise explosion, Muzan is temporarily nervous, but he intends to return for the final battle, albeit in his final battle. regeneration due to the Anti-Muzan drug he was infected with. As the story continues, Muzan is eventually defeated at the end of the story. He is stopped until sunrise and finally dies in Demon Slayer Chapter 200, which was published in Weekly Shonen Jump Issue #18 on March 30, 2020.
“My body will soon succumb to the sunlight… but my memories are also eternal and indestructible. I will also pass on my memories to this boy. My breathing and my heart are giving up, but not all my cells have been destroyed. There is still time. I will pour all my blood and strength into him. That way, I will not lose to death, Kamado Conjiro, and I will not lose to death. strongest Demon King Because of you blood, are you the same as Kamado Nezuko, you are unique.—Muzan to Tanjiro in Demon Slayer chapter 201
Muzan's death at the end of Demon Slayer gives great respite, but not for long. Immediately after, the most shocking revelation is revealed, as an even stronger enemy is about to be born soon after in Demon Slayer Chapter 201. In this chapter, it was revealed that Tanjiro received all of Muzan's blood, and his ultimate transformation began. Muzan planned to turn Tanjiro into the ultimate demon, one who even surpassed him in power. To that end, Tanjiro's eyes became demonic, and he gained regenerative powers with a Muzan-like appearance.
As the next Demon King, Tanjiro's power overshadows anything else we saw in the story. Like Nezuko, he develops resistance to the sun, which was Muzan's only real weakness that the Corps had to exploit in order to kill him. In addition to that, Demon King Tanjiro also has access to Sun Breathing, making him the ultimate creature. As a villain, no enemy even comes close to Demon King Tanjiro, as he is impossible to kill, no matter what breathing styles are used on him. Not only was Tanjiro far more powerful than Muzan, but he most likely surpassed Yoriichi as well, making him the strongest character in the entire series.
How Demon King Tanjiro's ultimate transformation failed at the end of Demon Slayer
Demon King Tanjiro's transformation was a disaster that everyone was determined to prevent before it fully materialized. At that time, the Demon Slayer Corps was at its limit, and most of the Hashira had already perished, but they still took up arms to try and kill Tanjiro before everything went to ruins. Fortunately, the transformation failed, thanks to a few key characters.
In Demon Slayer chapter 202, Nezuko is finally back in the story after being absent for much of the last arcs. She immediately hugs Tanjiro and tries to stop him. While this does not completely slow down his demonic nature, with Nezuko as a distraction, Kanao Tsuyuri uses the final form of Flower Breathing: Equinoctial Vermilion Eye to amplify her perception to the max and inject Tanjiro with a vial of Anti-Demon Antidote created by both Shinobu and Lady Tamayo before their deaths. Kanao becomes completely blind, but her efforts pay off.
“I guess that's why I still have one eye left. Okay, Shinobu? He turned into a demon just moments ago. So right now, even with one eye, I can squeeze in an attack on Tanjiro. Flower Breathing Final Form: Equinoctial Vermilion Eye.” — Kanao in Demon Slayer Chapter 202
Immediately after, the antidote begins to take effect, and despite Muzan's efforts to try and convince Tanjiro to go through with his transformation, it inevitably fails in Demon Slayer Chapter 203, April 27, 2020. It is in this chapter that Tanjiro is officially freed and wakes up as a human once again, with the worst-case scenario of having thwarted all efforts, thanks to the worst-case scenario. involved.
Demon King Tanjiro will make his debut in Infinity Castle Part 3, which is expected to be released in 2029
Demon King Tanjiro will be a force to be reckoned with, and we can't wait to see him finally brought to life by Ufotable Studio in the anime. Unfortunately, Demon King Tanjiro will not be seen anytime soon. For now, Demon Slayer: Infinity Castle Part 2 is the next movie in the line, and it will cover the battles against Upper Rank 1 Kokushibo and Upper Rank 2 Doma.
In order for Demon King Tanjiro to appear, the Muzan battle must be finished first, which will only take place in the final film of the trilogy, tentatively titled Infinity Castle Part 3. Demon King Tanjiro will appear towards the end of this film as a shocking plot twist. At the moment, we don't have a release date for Infinity Castle Part 2, let alone Infinity Castle Part 3, but we expect these movies to be released sometime in 2027 and 2029, respectively.
Demon Slayer: Infinity Castle Part 1 will be available to stream on Crunchyroll starting July 28, 2026.
