What if Akaza didn’t fight Rengoku in Demon Slayer Mugen Train Arc?

What if Akaza didn’t fight Rengoku in Demon Slayer Mugen Train Arc?

One of the most eagerly awaited movies for Demon Slayer anime viewers was the Mugen Train arc. The main character Tanjiro and his fellow Demon Slayers board the Mugen Train in the film in order to look into a string of disappearances. They come across Kyojuro Rengoku, the Flame Hashira, who joins them on their journey. But soon the group is engaged in a bloody conflict with the formidable demon Enmu, with Akaza, one of the Twelve Kizuki, jumping into the melee to engage Rengoku in a bloody conflict. What if Akaza never engaged in combat to slay Rengoku? In this article, we will see how the events would have changed in the movie.

Rengoku Would still be alive in Demon Slayer

Rengoku Would still be alive in Demon Slayer

It’s conceivable that the demon slayers could have easily defeated Lower Rank One Demon, Enmu. And saved the passengers on the train if Akaza hadn’t fought. If Kyojuro Rengoku had lived, the team may have carried out their plan to exterminate more demons. Without Rengoku’s sacrifice, the movie’s emotional impact would have been very different.

Moreover, Akaza and Rengoku’s battle revealed a lot of information about the Demon Slayer world. Specifically concerning the hierarchy of demons and the characteristics of demon powers. It’s probable that a lot of this information would not have been made public at that time. Due to a potential slowdown in exposition, the viewer might not have understood the complexity of the Demon Slayer world.

Change in Character Development in Demon Slayer

One of the most significant events in the entire Demon Slayer series—and a turning point for Tanjiro and the other characters—was Rengoku’s demise. Tanjiro wouldn’t have been motivated to grow stronger and more determined to defend others if Rengoku hadn’t passed away. Similar to how Zenitsu and Inosuke may not have acquired the same amount of adoration and respect for Rengoku as they did in the film, which was crucial to their development as characters.

Furthermore, Tanjiro’s whole journey in the series was greatly impacted by Rengoku’s passing. He learned from it that even the strongest soldiers can be vanquished. “Don’t hesitate, move forward,” were Rengoku’s parting words. And they served as a potent inspiration for Tanjiro to carry on with his battle with the demons.

Also, Akaza’s conflict with Rengoku was a crucial turning point in his character growth. Akaza learned a fresh respect for human life and honor through his conflict with Rengoku, which he took with him for the rest of the series. It’s conceivable that Akaza’s character journey would have taken a different turn without his battle with Rengoku. And he might not have come to appreciate the worth of human life in the same manner.

Change in the setting of the story

The emotional impact of the film would have been significantly lower if Akaza had never arrived to kill Rengoku. Without the weight of Rengoku’s sacrifice to give them significance, the movie’s events could have seemed a little pointless. The Demon Slayer tale would have suffered greatly from the loss of such a beloved character. It’s probable that many fans would have been upset if Rengoku hadn’t perished in the movie.

The battle between Akaza and Rengoku, and the continued struggle between the demon slayers and the demons, served as a major plot point in the final part of the series. It’s probable that the succeeding plot arcs would have developed differently without the conflict between Akaza and Rengoku, with the audience being less aware of the demon hierarchy and the nature of demon powers.

Tanjiro would not have learned about Sun breathing

Tanjiro would not have learned about Sun breathing

After Kyojuro Rengoku’s passing in Demon Slayer, Tanjiro paid a visit to his family’s residence, where Kyojuro’s father, Shinjuro Rengoku, gave him a history lesson on the Sun Breathing technique. Shinjuro Rengoku told Tanjiro that Tanjiro’s forehead scar is shaped like a sun, signifying his association with the Breath of the Sun technique. The first person to use Breath of the Sun, who was a member of the Rengoku family, created this unique and potent breathing technique.

According to Shinjuro, perfecting Sun Breathing necessitates a close relationship with and comprehension of the sun’s power. He also explains that despite the technique’s lengthy history and tradition within the Rengoku family, Kyojuro was the only one in his generation who was able to learn and apply it. Tanjiro shows his appreciation for Kyojuro’s power and his eagerness to learn more about Sun Breathing while they speak. When Tanjiro demonstrates potential, Shinjuro tells him that if he ever becomes proficient in the Breath of the Sun technique, he can teach him Sun Breathing.

If Kyojuro Rengoku would not die in the Mugen Train movie, Tanjiro would not have been able to recognize his potential to learn Sun Breathing Technique.


In conclusion, the story of the series would have been very different if Akaza hadn’t fought Rengoku in Demon Slayer. Several crucial elements of the world of Demon Slayer may not have been revealed at that time. Secondly, Rengoku’s survival would have had an impact on the other characters and events in the series. Also, Akaza’s character growth would have followed a different course. In the end, Akaza’s battle with Rengoku was crucial to the plot of Demon Slayer. Its absence would have had a significant effect on the entire series. Also, the emotional impact of the film would have been significantly reduced without Rengoku’s death.

Read More: Top 10 Turning points in ‘Death Note’

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