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10 Facts About Kaigaku in the Demon Slayer Anime

In the Infinity Castle arc, the Demon Slayer Corps fights Muzan Zenitsu and Kaigaku fighting each other to defeat each other.
Article Summary
  • Kaigaku betrayed the Demon Slayer Corps by accepting Muzan's blood and becoming Upper Moon 6.
  • Zenitsu finally defeats Kaigaku in the arc Infinity Castle, resolve their grudges and conflicts.
Disclaimer: This summary was created using Artificial Intelligence (AI)

10 Facts About Kaigaku in the Demon Slayer Anime

Kaigaku is one of the characters in Demon Slayer, besides that he is also a senior Zenitsu. Where both of them were once trained by the former Lightning Pillar, namely Jigoro Kuwajima.

Knowing that Kaigaku was once a demon slayer and ended up becoming a demon, it's certainly interesting to know who he really is, and learn a lot more about him in Demon Slayer.

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So, therefore, here are some interesting facts about Kaigaku in the Demon Slayer anime.

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Once a foster child of Gyomei

strongest demon slayer hashira
Gyomei Himejima. Source: Wallpaper Abyss

Since childhood, Kaigaku lived as an orphan. For this reason, he was then raised by Gyomei Himejima with other children at his temple. 

However, he had a bad character and was always known as a problematic child. So one day, he was caught stealing and he was thrown out of the temple. 

On his way from the temple, he encountered a demon and revealed the location of the temple to the demon in order to take revenge on the temple that had banished him.

Disciple of Jigoro Kuwajima, the Former Lightning Pillar

Jigoro Kuwajima
Jigoro Kuwajima. Source: Game Rant

As a trouble-making child, Kaigaku was once sent to prison. Then Jigoro saved Kaigaku along with Zenitsu Agatsuma, and made them both his disciples.

Not only that, Kaigaku is also expected to become a senior who is able to motivate and set an example for Zenitsu who is very cowardly. 

However, this task became a burden for Kaigaku, making him very annoyed by Zenitsu's presence.

Projected as the Successor to the Lightning Pillar

Projected as the Successor to the Lightning Pillar
Projected as the Successor to the Lightning Pillar. Source: Wallpaper Abyss

Even though Kaigaku often carries out various events that trouble the people around him, Kaigaku is still believed to be the successor of the Lightning Pillar.

What makes him worthy of being the successor to the Lightning Pillar is his amazing strength and survival skills.

And he also has great potential so he can join the Demon Slayer Corps. 

Unable to Master the First Form of Lightning Breathing Technique

Become a Traitor of the Demon Slayer Corps
Unable to Master the First Form of the Lightning Breathing Technique. Source: Miccope

Kaigaku is someone who is very skilled in swordsmanship. Apart from that, he also easily mastered all five forms of the lightning breathing technique taught by his teacher.

However, Kaigaku was unable to use the first form of the Lightning Breathing technique. Mastering the first form is crucial for optimal performance of the other techniques.

And this reason made Jigoro decide that Jim Zenitsu had the right to be his successor. 

This then gave birth to deep hatred within Kaigaku towards Zenitsu.

Become a Traitor of the Demon Slayer Corps

Kaigaku Demon Slayer
Becoming a Traitor to the Demon Slayer Corps. Source: VCGamers

After Zenitusi was appointed by Jigoro as the successor to the Lightning Pillar, Kaigaku tried to get attention in various ways.

One of the ways he did this was by finding and fighting Kokushibo, the first Upper Moon Demon.

As a result, he was easily defeated by Kokushibo, but this paved the way for Kaigaku to betray him again. 

Then Kaigaku begged Kokushibo for mercy and made him a demon after voluntarily accepting Muzan's blood from Kokushibo.

Became the Cause of Jigoro's Death

Jigoro Kuwajima
Jigoro Kuwajima. Source: Game Rant

Because he followed in Kokushibo's footsteps, from being a Demon Slayer to defecting and siding with the demons. 

This made Jigoro Kuwajima feel embarrassed. And Jigoro lost interest in his life after learning the news. 

And out of a sense of responsibility for his own student, Jigoro finally ended his life by committing seppuku.

Becoming the New Upper Moon 6

Kaigaku Demon Slayer
Becoming the New Upper Moon 6. Source: Wallpaper Abyss

After the defeat of the Upper Moon 6 Demons, Gyutaro and Daki, he was promoted to fill the vacant position and became the new Upper Moon 6.

However, he only held that position briefly because he had to experience the invasion incident. Infinity Castle by the Demon Slayer Corps.

Fighting Using Swords

Fighting Using Swords
Fighting Using Swords. Source: Kimetsu no Yaiba Wiki

As a demon who can use breathing techniques, he can use nichirin swords to fight. 

When he became a demon, his nichirin sword had become much stronger due to the modifications made with his demon blood. 

This sword he uses as an intermediary for the breathing technique used to circulate his blood to unleash his lightning breathing technique. 

Defeated by Zenitsu

Kaigaku
Kaigaku vs Zenitsu. Source: Youtube/Light

In the Infinity Castle arc, the Demon Slayer Corps battles Muzan and the remaining demons. Here, Zenitsu and Kaigaku seek each other out, hoping for a one-on-one battle based on their respective grudges. 

The result of this battle was Zenitsu who managed to defeat Kaigaku even though he had to bleed.

The voice actor is Yoshimasa Hosoya

Yoshimasa Hosoya
Yoshimasa Hosoya. Source: Facebook

Kaigaku is one of the demons that appears in Infinity Castle arc. The voice actor who voices him is quite interesting to fans, because his voice is provided by Yoshimasa Hosoya who also voices Doppo Kunikida in the anime Bungou Stray Dogs and Reiner Braun in Attack on Titan: The Final Season. 

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So, that concludes our discussion of Kaigaku from the Demon Slayer anime. We hope this article was helpful and informative!

Fikri Basrizal

An SEO content writer with experience writing in various niches, such as games, tech & gadgets, anime & manga, and more. Also, I'm a district runner, haha.


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