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, SuspenseSuspense
Themes: MechaMecha, PsychologicalPsychological
Duration: 24 min. per ep.
Rating: R - 17+ (violence & profanity)


Score: 6.561 (scored by 1905919,059 users)
1 indicates a weighted score.
Ranked: #64452
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #2931
Members: 57,116
Favorites: 79

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Ranked #6445Popularity #2931Members 57,116
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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]

Characters & Voice Actors


Yoshida, Kento
Kawamura, Hiroshi
Assistant Producer
Okamura, Takema
Assistant Producer
Satou, Junichi


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 ...
Mar 19, 2024
A combination of horror and mecha what could go wrong? well in this show case almost everything.
If you ever asked yourself this question "A mecha show cannot be boring,it has giant robots right?"
Then this show is the answer to that question,it spends hours and hours of dialogue,useless flashbacks that repeat themselves over and over again,a bunch of scifi-horror jargon that never gets fully explained,unlikeable and annoying characters and the only two decent characters were never given enough screentime to carry the show.The mechas and their weapons feel weak through the whole show,they look like they are shooting water bullets,the main giant "enemy" is overpowered and ...

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Spring 2014 Simulcast List [Update 4/19]

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Recent Forum Discussion

Poll: M3: Sono Kuroki Hagane Episode 24 Discussion ( 1 2 )
Stark700 - Sep 29, 2014
76 repliesby Erdgeist »»
Mar 21, 8:23 PM
Poll: M3: Sono Kuroki Hagane Episode 10 Discussion
Stark700 - Jun 23, 2014
45 repliesby Phobossus »»
Mar 17, 7:41 AM
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