Koushaku Chouno
main character
TV
6.9
My TrackerPLANNING
Episode: 0 / 26
My Score:
Anime DetailsFINISHED
Estimated watch time
10h 24m
⚡ 6 days at 5 eps/day
Tags & Tropes
School79%Shounen79%Male Protagonist79%Magic79%Alchemy79%Female Protagonist60%Tomboy60%Twins53%Incest20%
TVFINISHED2006 FALL6.9 / 10 AniList score
Arms Alchemy
武装錬金• Busou Renkin
Synopsis & Story
The story begins when high school student Kazuki Muto is killed one night saving a mysterious girl from a monster, only to wake up in his school dorm, believing it to have been a dream. However, he soon finds out that dream wasn't a dream at all when a giant serpentine monster attacks him and his sister. Tokiko Tsumura, the girl he saved, explains that the monster is a homunculus. Kazuki had been attacked and killed by it when he was rescuing her. However, she, feeling responsible for him, revived him by placing a Kakugane medallion in his chest, serving as a replacement heart. The Kakugane, as Tokiko explains, is an alchemical device that, when activated, takes a certain form based on the Kakugane's user, forming a unique Buso Renkin. The Buso Renkin is the only thing that can destroy a homunculus monster. Using this, Kazuki creates his own Buso Renkin (the "Sunlight Heart", a huge lance). Along with Tokiko and her own Buso Renkin (the "Valkyrie Skirt", an execution scythe), Kazuki joins the fight against the homunculi and their master.
Trailer
Search YouTubeWhere to Watch Officially
Availability, audio and subtitles vary by region and service.
Featured Cast & Voice Actors
Franchise Universe & Related Entries
Aniphoria guide
Arms Alchemy: should you watch it?
At a glance
Arms Alchemy has been met with mixed reactions, with an average AniList score of 69/100 — 38% of 9,162 ratings are 8/10 or higher.
It ranks #45 highest-rated anime of 2006, and #26 most popular anime of 2006, and #16 highest-rated anime of Fall 2006 on AniList.
Of the 17K AniList users who started it, 8.1% dropped it, so it is dropped at a typical rate; 13.4K have finished it.
At about 10 h 24 min in total, plan on one to two weeks at a couple of episodes a day.
Best for viewers who enjoy Action, Comedy, Fantasy — especially school, shounen, male protagonist, magic.
Episodes
26 episodes are listed.
Main cast & creators
- Original creator
- Nobuhiro Watsuki
- Director
- Takao Kato
- Character design
- Akio Takami
- Music
- Kouhei Tanaka
Opening & ending themes
Openings
- OP1“Makka na Chikai” by Yoshiki Fukuyama · eps 2-26
Endings
- ED1“Hoshi Akari” · eps 1-14, 26
- ED2“Itoshiki Sekai” · eps 15-25
Theme data from AnimeThemes.moe.
Arms Alchemy FAQ
- How many episodes does Arms Alchemy have?
- Arms Alchemy has 26 episodes of about 24 minutes each, roughly 10 h 24 min in total.
- How long does it take to watch Arms Alchemy?
- About 10 h 24 min back to back. At two episodes a day it takes 13 days; at one hour a day, about 11 days.
- Is Arms Alchemy finished?
- Yes. Arms Alchemy has finished airing — the final episode aired March 29, 2007.
- Is there a season 2 of Arms Alchemy?
- No sequel is listed for Arms Alchemy as of October 2026. You can continue the story in the original manga.
- Is Arms Alchemy based on a manga?
- Yes. Arms Alchemy adapts the manga by Nobuhiro Watsuki.
- Who animated Arms Alchemy?
- Arms Alchemy was animated by Xebec and directed by Takao Kato.
- Who sings the opening of Arms Alchemy?
- The opening, "Makka na Chikai", is performed by Yoshiki Fukuyama.
- Where can I watch Arms Alchemy?
- Arms Alchemy is listed on Tubi TV. Availability varies by region — check the streaming links on this page.