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Critical Reviews
What critics generally liked:
The animation and visuals are widely praised. Ufotable’s work on the fight sequences, especially the depiction of the Infinity Castle itself, is considered spectacular. (The Guardian)
Emotional weight: many reviews appreciate the flashbacks and character arcs (notably of Akaza), giving more depth to the villains. (The Guardian)
Faithful adaptation of the manga: the movie is seen to deliver many of the chapters’ biggest moments in ways that resonate. (The Guardian)
What critics found less successful:
Pacing issues: the heavy use of flashbacks tends to slow down the forward momentum. For some viewers, it breaks the tension built by the action. (The Guardian)
The film doesn’t resolve all narrative threads — as a first part of a trilogy, some felt it ended too “on a cliff” without enough payoff. (Rotten Tomatoes)
Some supporting characters get less screen time, which disappointed fans who enjoy the full ensemble. (Metacritic)
Scores from critics:
Metacritic’s early reviews: e.g. Total Film gave it ~80/100, Screen Daily ~70/100, IGN ~60/100. (Metacritic)
The Guardian (Phuong Le) gave it 4/5 stars, calling it “a spectacular treat” with strong visuals and emotional impact (though noting some flashback slowdowns). (The Guardian)
Netizen / Fan / Audience Reviews
Highlights:
Many viewers say the movie is emotionally powerful, several noting they were moved / cried during certain scenes. (The Times of India)
Huge praise for the animation (“breathtaking,” “best work yet”, “Ufotable is GOAT”) and sound / music — fans especially behind fight scenes on big screens. (The Times of India)
Fans appreciate how manga moments are visualised: they like seeing key panels brought to life. (The Times of India)
Criticisms from netizens:
Some felt the flashbacks and backstory segments (especially for Akaza / the Upper Rank demons) were too long — they disrupted flow. (IMDb)
A few say that certain character moments or fights didn’t feel as strong as expected, or that some characters were underused. (IMDb)
Average Ratings
Putting together what’s available:
On Rotten Tomatoes, the critical “Tomatometer” (percentage of positive reviews) is very high: ~95%. (GamesRadar+)
On Filmarks in Japan, first-day satisfaction from user reviews is about 4.36/5 (based on ~8,114 people). (Wikipedia)
On IMDb, audience reception is very positive; one article notes it has become the “highest-rated original anime movie” there, around 8.9/10. (GamesRadar+)
On RatingGraph, the average rating is about 8.7/10 with many votes. (Rating Graph)
If we convert things to a common “out of 5” scale, many audience scores map to ~ 4.3-4.5 / 5. Critics’ star ratings tend to cluster around 4/5 as well, though some are more mixed (~3-3.5/5) because of pacing or structure.
Memorable Quotes & “Best Lines”
I wasn’t able to find many reliable full quotes from the movie (especially in English translation) from the sources I checked. One fan note, though, is about a Giyu Tomioka quote that was cut from the movie (present in the manga) and many fans mourn its absence. The line is:
“I must pass on what was entrusted to me. Never again will I let family and friends die before my eyes. I will save him. I will save Tanjiro… the same way I was saved.”
— Giyu Tomioka (ComicBook.com)
Because it was cut, fans consider it one of the most powerful quotes that could have been in the film but wasn’t. (ComicBook.com)
If you like, I can try compiling a list of accurate translated quotes from the film (Japanese & English) once more screenings have completed / more transcripts are available.
Opinion:
Agree with 3.5 rating.
I think it's more suited as a TV series rather than a movie with the multiple long flashbacks.