Top 9 Demon Slayer Soundtracks from Mugen Train — the Beginning of the Story to the End of the Battle Against Enmu　(Official Audio)

Hello, I’m Ocha.　I am a Japanese person who absolutely loves soundtracks.

This time, I’ll be introducing some of the background music from Demon Slayer: Kimetsu no Yaiba – The Movie: Mugen Train.

The Demon Slayer: Kimetsu no Yaiba movie Mugen Train is an absolutely phenomenal film. It surpassed Spirited Away, which had previously held the record for the highest-grossing film in Japan, to become the highest-grossing film of all time in the country. It also became the first Japanese film ever to surpass ¥40 billion at the box office.

I went to see it in theaters too. Unfortunately, I forgot my glasses and could barely see anything. But that meant I could focus almost entirely on the music, so I suppose I was happy in my own way.

The tracks included on this soundtrack are all fantastic. This time, I’ll be introducing some of the tracks I found particularly impressive among those used from the beginning of the story up through the end of the battle against Enmu.

I hope you enjoy them!

※The audio links included in this article are from official Spotify releases. All copyrights to the audio belong to their respective copyright holders. These links are included solely for the purpose of introducing and commenting on the music.

1. Mugen Train – avant-title –

This is an arrangement of “Homura”, the song performed by LiSA. Did you know that the composer of “Homura” is Yuki Kajiura? That’s exactly why something like this is possible.

If you’re skeptical, listen to the last 40 seconds. It sounds so Kajiura-like that I’m sure you’ll understand what I mean.

It’s basically like having another version of “Homura.”
Once you start getting into anime soundtracks, you get to discover songs like this, too. (Smug grin.)

2. Rengoku’s Battle – Part 1

This is the track that plays during Rengoku’s first battle scene. You could practically call it Kyojuro Rengoku’s theme.

It’s the scene where Rengoku gets to his feet, draws his sword, and takes down the demon in an instant.

The track is incredible from beginning to end, and since it’s relatively short and easy to listen to, it’s a great one to recommend to other people.

3. Rengoku’s Battle – Part 2

This is the track that plays when Rengoku instantly takes down the second demon with Second Form: Rising Scorching Sun.

It’s a little more distinctive than the previous track, but it also makes extensive use of Rengoku’s signature melody. There are also plenty of arrangement sections that appear only in this track, so if you’re a Rengoku fan, this is definitely one you should listen to.

4. Lingering Attachment to a Dream

This is the track that plays when Tanjiro breaks away from his family in the dream and starts running. I almost cried.

As the eldest son (only child), I managed to hold it together, but I might not have been so lucky if I had any siblings. In fact, an acquaintance of mine who has both a younger brother and a younger sister—and is the eldest—actually cried.

It starts off gently, builds into a grand orchestral piece, and then ends with a soft piano. The sheer emotional range of the track really gets to me. The melody from “Tanjiro Kamado’s Song” hits especially hard.

5. Battle Against Enmu Begins

As the title suggests, this is the track that plays during Tanjiro vs. Enmu.

It’s a five-minute track, so it might feel a little long, but please listen to the whole thing. Alternatively, watch the movie while paying attention to the music.

The track is perfectly synchronized with the visuals, with not a single wasted moment, so I really want you to hear it all the way through.

If you really want to, you can start listening from around 2:40, which should line up nicely with the scene—but seriously, please, please listen to the whole thing!

6. Insult and Anger

This was probably the scene that made me cry the most in the entire movie. I even teared up in the theater.

The idea of having a protagonist’s family or friends say horrible things to break them down mentally is a pretty common trope. But seeing Tanjiro refuse to break down at all and simply brush it off with, “There’s no way they would ever say something like that!!” was just overflowing with love and trust. It completely broke my heart.

I think this kind of unwavering trust and affection is one of the things that makes Demon Slayer so special.

7. Enmu Merges with the Train

The CG tentacles were so disgustingly creepy that I might not have been able to focus on the music at all. Same here.

There are also a lot of lines of dialogue around this part, so I don’t think it was particularly easy to focus on the music itself. Same here.

It has a sound that feels like Tanjiro’s theme, but with a somewhat darker edge, as if he’s being pushed into a difficult battle. That melody really grows on you.

I feel like this particular melody isn’t used much after this point (though I have no hard evidence to back that up), so let’s remember it as a relatively rare track.

8. Battle Against Enmu: Forced Deep Sleep – Eyes

This is the track that plays when Tanjiro is about to take his own life in the real world. (That sounds pretty intense when you put it into words.)

It’s honestly a rather surreal scene, with eyes growing all over the place and putting everyone under hypnosis. But the music is so good that it somehow makes the whole thing look incredibly cool.

I especially recommend listening from around 0:58.

9. Consecutive Attacks – Heki-ra no Ten – Train Derailment

This is the track that plays from the scene where Tanjiro and Inosuke work together until the train derails.

I absolutely love this one. Especially from around 0:43, when Tanjiro and Inosuke are slicing through the tentacles in midair—that part is incredible. I’m pretty sure I’ve listened to this track at least 100 times. I’ve only watched the movie about 5 times, though.

Conclusion

That’s all for this one.

It’s hard to talk about this movie without the main focus inevitably becoming Rengoku vs. Akaza, but the story leading up to that battle is filled with memorable scenes, and the music is just as incredible. It’s no wonder the movie made over ¥40 billion.

I didn’t cover them this time, but the soundtrack also includes several arrangements of Inosuke’s theme and Zenitsu’s theme. They’re somewhere between “Mugen Train – avant-title -” and “Consecutive Attacks – Heki-ra no Ten – Train Derailment,” so if you’d like to hear them, be sure to look for them.

And while you’re at it, feel free to jump ahead and enjoy the music from the Akaza battle too.

Next time, I’ll either be covering VS. Akaza or the OST from another series.

Stay tuned!