What is the song of Reze in the Chainsaw Man Reze movie? Significance explained

One of the most confusing yet haunting moments in Chainsaw Man Reze movie was the song of Reze; she is singing a russian song while struggling as an assassin. This song sounded like a lullaby, and viewers were confused by the juxtaposition of violence and serenity. Many want to know the origin of this song and why it was a perfect addition to portray Reze's character.

The name of the song is "Jane Slept in the Church. It is written by Tatsuki Fujimoto himself, and the song for the Chainsaw Man Reze movie was composed by Kensuke Ushio. Despite it sounding legit, this song is not a pre-existing Russian song. It was added by the creator himself. Many have scoured music databases and archives looking for any historical or cultural reference, but nothing matched the lyrics or melody.

The lyrics of this song by Reze are simple yet poetic, painting a picture of an ordinary date:

"The day of my date with Jane, all is ready. We’ll drink coffee and eat omelettes at the café. After, we’ll walk in the park and visit the aquarium to see Jane’s favorite dolphins and penguins. We’ll rest in the afternoon, and at night, sleep in the church"

Looking at the English translation of the song, it is almost like this song was supposed to be peaceful and almost childlike. Now this is something that Reze's character never got to be.

Some fans have a theory that this song could have taken inspiration from a romance novel known as Dearest Mary Jane by Betty Neels. The summary of the story is that two sisters fall in love with the same man. So this could be a direct reference to Denji having romantic feelings for Makima and Reze.

Fans even suggested that in the Chainsaw Man Reze movie, Jane represents Reze, the girl who wants to live simply and run a café, while Felicity mirrors Makima, the alluring and manipulative counterpart. Although the creator has not given credibility to this speculation, it ended up just being popular among fans.

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The truth from Tatsuki Fujimoto

According to the official theater guidebook released in Japan alongside the Chainsaw Man Reze movie, Fujimoto, the creator of this series, himself clarified the intent behind writing the song of Reze:

“It’s just a song about an ordinary date. At the end, the person sleeps in a church — it’s about wanting to live and die like a normal person.”

This confirms that “Jane Slept in the Church” the song of Reze is Fujimoto’s original creation, representing Reze’s suppressed wish to live a normal life, where she does not have to be part of war, experiments, and manipulation that has led to be the cause of her existence so far.

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What the scene represents

Reze quietly singing the song of Reze while she ruthlessly kills the assassin in the Chainsaw Man Reze movie is Fujimoto's way of showing her true nature. She might be a beauty, but Reze is also extremely brutal when needed. In the movie, her voice is extremely gentle when she is trying to put the assassin to sleep.

But her actions are sharply opposite. It’s as though, for a fleeting moment, she retreats into her imagination, a peaceful date with Denji, dolphins, penguins, and laughter, before returning to the harshness of her reality.

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A symbol of Reze’s humanity

Throughout the Bomb Girl arc, Reze’s defining trait is her conflict between weapon and woman, killer and dreamer. The song becomes her most vulnerable moment, a musical glimpse into the human heart buried beneath her deadly exterior.

Even the imagery in the song of Reze, from cafés, aquariums, and penguins, all seems to connect to her fantasy of innocence with Denji’s later experiences. The Russian lyrics, the imagery of rest and remembrance, and the recurring motif of “church” suggest that Reze isn’t just singing about love; in the Chainsaw Man Reze movie, she’s singing about redemption.

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Final thoughts on Song of Reze

In the end, “Jane Slept in the Church” is not merely a song of Reze; it’s a requiem for the life Reze could never live. Through its deceptively simple lyrics, Tatsuki Fujimoto manages to capture the essence of Chainsaw Man Reze Movie, a brutal world where even devils dream of gentleness.