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Spiral: Bond of Reasoning poster
TV Series Finished Fall 2002

Spiral: Bond of Reasoning

Spiral: Suiri no Kizuna · スパイラル -推理の絆-

Comedy Drama Mystery
★ 6.7AniList score
25Episodes
23 minPer episode
J.C.STAFFStudio
MangaSource

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… Read more

Storyline

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)

Characters & Japanese Voice Cast

Ayumu Narumi Ayumu Narumi Main VA: Kenichi Suzumura
Hiyono Yuizaki Hiyono Yuizaki Main VA: Masumi Asano
Eyes Rutherford Eyes Rutherford Main VA: Akira Ishida
Rio Takeuchi Rio Takeuchi Main VA: Yui Horie
Kousuke Asazuki Kousuke Asazuki Main VA: Takeshi Kusao
Kanone Hilbert Kanone Hilbert Supporting VA: Kenji Nojima
Ryoko Takamachi Ryoko Takamachi Supporting VA: Hitomi Katou
Kiyotaka Narumi Kiyotaka Narumi Supporting VA: Kazuhiko Inoue
Madoka Narumi Madoka Narumi Supporting VA: Kotono Mitsuishi
Sayoko Shiranagatani Sayoko Shiranagatani Supporting VA: Mai Nakahara
Suemaru Wataya Suemaru Wataya Supporting VA: Bin Shimada
Takashi Sonobe Takashi Sonobe Supporting VA: Masaya Onosaka

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Frequently Asked Questions

How many episodes does Spiral: Bond of Reasoning have?

Spiral: Bond of Reasoning has 25 episodes.

Which studio made Spiral: Bond of Reasoning?

Spiral: Bond of Reasoning is produced by J.C.STAFF.

Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 24 October 2026, 11:15 AM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].