Spiral: Suiri no Kizuna

Spiral: Bond of Reasoning

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Alternative Titles

Japanese: スパイラル -推理の絆-
English: Spiral: Bond of Reasoning
More titles


Type: TV
Episodes: 25
Status: Finished Airing
Aired: Oct 1, 2002 to Mar 25, 2003
Premiered: Fall 2002
Broadcast: Tuesdays at 18:00 (JST)
Licensors: Funimation
Studios: J.C.Staff
Source: Manga
Genres: DramaDrama, MysteryMystery
Demographic: ShounenShounen
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 7.221 (scored by 2330123,301 users)
1 indicates a weighted score.
Ranked: #31042
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #3051
Members: 53,144
Favorites: 291

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Ranked #3104Popularity #3051Members 53,144
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Episodes: /25


Ayumu Narumi has lived all his life in the shadow of his famous detective brother, Kiyotaka. However, Kiyotaka disappeared two years ago, leaving behind his wife Madoka and Ayumu himself, along with a cryptic message about the "Blade Children."

One day, a girl at Ayumu's school suddenly dies. What seemed like a suicide at first glance turns out to be a murder, and Ayumu is the prime suspect. While investigating the person responsible for framing him, he discovers that the mysterious Blade Children are involved—and they somehow know Kiyotaka personally. Ayumu soon finds out just how dangerous the Blade Children are and learns that, in reality, he and Kiyotaka are intertwined more closely than he had ever believed.

[Written by MAL Rewrite]

Characters & Voice Actors


Cook, Justin
Watson, Barry
Katsumata, Hideo
Hosoda, Mamoru
Director, Episode Director, Storyboard


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Kibouhou (希望峰)" by Strawberry Jam

Ending Theme

"Cocktail" by Hysteric Blue


Jul 16, 2007
Spiral is one of those animes that gets a lot of mixed reviews. In my opinion, however, it is one of the greatest animes ever created for many reasons. It\'s not completely perfect, of course -- I don\'t believe anything is perfect -- but it comes pretty darn close.


\"I\'m going to pursue the mystery of the Blade Children.\" This single line, spoken by Kiyotaka Narumi, is the premise for the entire show. Above all else, Spiral is a mystery anime, and it centers around what, exactly, the Blade Children are. It\'s a fascinating idea, that, most unfortunately, is never fully ...
Jun 28, 2012
Mixed Feelings
Spiral is one of those series that I really, really want to love. It had the makings of a hit. But somehow, it ended with more unfulfilled potential than it started with, and I felt cheated for watching the entire 25 episodes.

After a bit of exposition when we meet Narumi Otouto (as the Blade Children refer to him) and the other characters, the story poses a question to Narumi, his detective sister-in-law, and the viewers: What are the Blade Children? Almost halfway into the story, we finally learn what Blade Children are, and if you're not watching carefully you'll miss it. Probably better that you ...
Jun 8, 2012
This was probably one of the worst anime adaptations of a manga, ever. It started off well, kept me going for a while, but I made a huge mistake and didn't look into this anime before watching it all. The ending was very weak. This was one of those animes that was created for a season and if it responded well it would have gone on for a second season- only it didn't do well and it ends rather poorly. The entire story revolves around the mystery of "Who are the Blade Children?" and the disappearance of the main character's older brother. Buuuuuut, if you ...

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The irises
Yuliyshii - Jan 27
1 repliesby BlueMoonTornado »»
Jan 27, 2:07 PM
Poll: Spiral: Suiri no Kizuna Episode 25 Discussion
mikzflava - Aug 5, 2010
35 repliesby Archean-Return »»
Sep 22, 2023 7:20 PM
Poll: Spiral: Suiri no Kizuna Episode 24 Discussion
maruf92bisj - Jun 18, 2014
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Sep 22, 2023 6:39 PM
Poll: Spiral: Suiri no Kizuna Episode 23 Discussion
maruf92bisj - Jun 18, 2014
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Sep 22, 2023 6:14 PM
Poll: Spiral: Suiri no Kizuna Episode 22 Discussion
maruf92bisj - Jun 18, 2014
3 repliesby Archean-Return »»
Sep 22, 2023 5:16 PM