M3: Sono Kuroki Hagane

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Alternative Titles

Synonyms: M3: Sono Kuroki Tetsu, M3 The Dark Metal, Mortal Metal Memories
Japanese: M3~ソノ黒キ鋼~


Type: TV
Episodes: 24
Status: Finished Airing
Aired: Apr 22, 2014 to Sep 30, 2014
Premiered: Spring 2014
Broadcast: Tuesdays at 01:35 (JST)
Licensors: None found, add some
Studios: Satelight, C2C
Source: Original
Genres: ActionAction, DramaDrama, MysteryMystery, Sci-FiSci-Fi
Themes: MechaMecha, PsychologicalPsychological
Duration: 24 min. per ep.
Rating: R - 17+ (violence & profanity)


Score: 6.571 (scored by 1874318,743 users)
1 indicates a weighted score.
Ranked: #62972
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #2880
Members: 56,617
Favorites: 81

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Ranked #6297Popularity #2880Members 56,617
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Episodes: /24


In a dark void known as the Lightless Realm, a group of children meet and bond, but are then separated and returned to their own dimension. Years later, these children reunite to fight "Admonitions," monsters that originate from the same void, using robots known as "Vess." However, their efforts only slow the ever-encroaching and expanding Lightless Realm from infecting their world.

Their lives take a drastic turn when a new foe appears in the form of a "Corpse," whose song is rumored to kill any who hear it within nine days. The "Corpse Song" is heard by the group, and with this, they each begin to pull away and become caught up in their own personal problems—ultimately threatening the fate of humanity.

[Written by MAL Rewrite]


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Related Anime

Characters & Voice Actors


Yoshida, Kento
Okamura, Takema
Assistant Producer
Satou, Junichi
Hamano, Takatoshi
Sound Director


Opening Theme

Apple Music
Amazon Music
Youtube Music
1: "Re:REMEMBER" by May'n (eps 1-13)
2: "Replica (レプリカ)" by Maaya Sakamoto (eps 14-23)

Ending Theme

1: "ego-izm" by la la larks (eps 1-13)
2: "SABLE" by nano (eps 14-23)
3: "Replica (レプリカ)" by Maaya Sakamoto (eps 24)


Sep 21, 2017
M3 Sono Kuroki Hagane is a surprisingly very good psychological oriented mecha anime set in a dark atmosphere.


The anime focuses on a team of young pilots using giant machines to discover and explore a mysterious dark and disrupted zone appearing on earth.

While brutal action packed fights were expected, surprisingly this anime delves very deeply in the emotion and psychology of the characters. Another surprise is that this aspect is treated with real intelligence and maturity. The psychological issues are addressed gradually with subtlety, finesse and poetry.

I would like to stress this, not only as an anime fan but also ...
Nov 17, 2017
Mixed Feelings
Communication. Understanding. Connection. All things we as humans struggle with. To truly know another person is difficult on its own; some would say impossible entirely. That, however, doesn’t stop us from trying, no matter the pain. Pain that births from failed attempts of understanding, thinking you know someone but in truth do not. Sometimes, trying to connect to another is more painful and can hurt more than trying to cause them misery. But who hurts more: the person who tried and failed, or the person on the receiving end? Can comprehension of others truly be had if we are separate beings? And should we even ...
Jan 23, 2020
This was something I had grabbed because I wanted to watch another mecha show. (And it was recommended from the Bokurano page, so yet another downvote for MAL recommendation givers.) I really should have grabbed almost anything else.

The characters are about as unlikable as possible, and the stilted and awkward dialog does nothing to help with that. I was actively rooting for the big bad to kill all of the kids off, but only after the grownups had been piled up and burned alive so at least some of the screaming would actually have a purpose behind it. The plot is inane technobabble stirred ...

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Recent News

Spring 2014 Simulcast List [Update 4/19]

Spring 2014 Simulcast List [Update 4/19]

Crunchyroll (All times are Pacific for premium users):Dragon Collection Territories: USA, Canada, UK, Ireland, Australia, New Zealand, South Africa, Denmark, Finland...read more

Spring 2014 Preview

Spring 2014 Preview

In this thread, you'll find a comprehensive list of Spring 2014 anime commercials (CMs) and promotional videos (PVs). This post will be continuously updated as ...read more

Recent Forum Discussion

Poll: M3: Sono Kuroki Hagane Episode 24 Discussion ( 1 2 )
Stark700 - Sep 29, 2014
74 repliesby Archean-Return »»
Jul 29, 2023 12:02 PM
Poll: M3: Sono Kuroki Hagane Episode 23 Discussion
Stark700 - Sep 22, 2014
27 repliesby Archean-Return »»
Jul 29, 2023 11:30 AM
Poll: M3: Sono Kuroki Hagane Episode 22 Discussion
Stark700 - Sep 15, 2014
25 repliesby Archean-Return »»
Jul 29, 2023 10:58 AM
Poll: M3: Sono Kuroki Hagane Episode 21 Discussion
Stark700 - Sep 8, 2014
25 repliesby Archean-Return »»
Jul 29, 2023 10:27 AM
Poll: M3: Sono Kuroki Hagane Episode 20 Discussion
Stark700 - Sep 1, 2014
27 repliesby Archean-Return »»
Jul 29, 2023 9:57 AM