Ayumu Narumi
main character
TV
6.7
My TrackerPLANNING
Episode: 0 / 25
My Score:
Anime DetailsFINISHED
- Format
- TV series
- Episodes
- 25
- Episode length
- 23 min
- Total watch time
- 9 h 35 min
- Status
- Finished
- Aired
- October 1, 2002 – March 25, 2003
- Season
- Fall 2002
- Source
- Manga
- Studio
- J.C.STAFF
- Director
- Shingo Kaneko
- Original creator
- Kyou Shirodaira
- Music
- Akira Mitake
- Age rating
- PG — Teens 13 or older
- Country
- Japan
- AniList score
- 67/100
- Also known as
- Spiral, Spiral - Lines of Reasoning, Spiral - Suiri no Kizuna
- Score across sites
- 7.08/10
Estimated watch time
9h 35m
⚡ 5 days at 5 eps/day
Tags & Tropes
Detective84%Male Protagonist79%Conspiracy79%Shounen60%School50%Police20%
TVFINISHED2002 FALL6.7 / 10 AniList score
Spiral: Bond of Reasoning
スパイラル -推理の絆-• Spiral: Suiri no Kizuna
Synopsis
Ayumu Narumi's older brother Kiyotaka, a renowned detective and piano player, disappears all of a sudden. The only clue Narumi has, are the Blade Children. Two years later a row of murders and incidents begin, relating to the Blade Children. Together with school journalist, Hiyono Yuizaki, Narumi tries to figure out their destiny. (Source: Anime News Network)
Main cast & voice actors
Should you watch Spiral: Bond of Reasoning?
Probably, if you enjoy comedy, drama and mystery, especially stories with detective, male protagonist, conspiracy.
Reception is positive but mixed: 67/100 on AniList, with 36% of 2.7K ratings at 8/10 or higher. It's the #34 highest-rated anime of 2002.
About 8.3% of viewers drop it, which is typical.
At about 9 h 35 min in total, plan on one to two weeks at a couple of episodes a day.
Where to Watch Officially
A streaming link is not listed for this title yet.
Episodes
25 episodes are listed.
Creators & key staff
- Original creator
- Kyou Shirodaira
- Director
- Shingo Kaneko
- Series composition
- Natsuko Takahashi
- Character design
- Yumi Nakayama
- Music
- Akira Mitake
Related entries
Opening & ending themes
Openings (1)
- OP1“Kibouhou”
Endings (1)
- ED1“Cocktail” by Hysteric Blue
Theme data from AnimeThemes.moe.
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Spiral: Bond of Reasoning FAQ
How many episodes does Spiral: Bond of Reasoning have?
Spiral: Bond of Reasoning has 25 episodes of about 23 minutes each, roughly 9 h 35 min in total.
How long does it take to watch Spiral: Bond of Reasoning?
About 9 h 35 min back to back. At two episodes a day it takes 13 days; at one hour a day, about 10 days.
Is Spiral: Bond of Reasoning finished?
Yes. Spiral: Bond of Reasoning has finished airing — the final episode aired March 25, 2003.
Is there a season 2 of Spiral: Bond of Reasoning?
No sequel is listed for Spiral: Bond of Reasoning as of October 2026. You can continue the story in the original manga.
Is Spiral: Bond of Reasoning based on a manga?
Yes. Spiral: Bond of Reasoning adapts the manga by Kyou Shirodaira.
Who animated Spiral: Bond of Reasoning?
Spiral: Bond of Reasoning was animated by J.C.STAFF and directed by Shingo Kaneko.
Who sings the opening of Spiral: Bond of Reasoning?
The opening, "Kibouhou", is performed by an uncredited artist.