Black Secret Technique Machine One Shot[1]
Name
Kanji	黒秘技機々一発
Rōmaji	Kurohigi Kiki Ippatsu
Literal English	Black Secret Technique Machine One Shot
English TV	Secret Black Move: Iron Maiden
Debut
Manga	Chapter #214
Anime	Naruto Episode #125
Movie	Naruto the Movie 2: Legend of the Stone of Gelel
Game	Naruto: Ultimate Ninja 3
Appears in	Anime, Manga, Game and Movie
Data
Classification	Ninjutsu
Rank	B-rank
Class	Offensive
Range	Short-range
Other jutsu
Parent jutsu	Puppet Technique
Derived jutsu Black Secret Technique: Machine Triple Shot
Users Kankurō (Puppetry using Black Ant and Crow)

First the opponent must be trapped in the torso of Black Ant. After this is accomplished, Crow separates into eight components. The torso is left behind while the arms, legs, and head are positioned around Black Ant, each with a sharp blade. Kankurō guides the separate pieces into slits in Black Ant's torso, impaling the victim inside.

Trivia

• The name of this secret technique is a play on a popular Japanese toy "Kurohige Kiki Ippatsu", in which the goal of the toy is to stick little plastic swords into a barrel to make the pirate in the centre jump out.
• This technique follows a couple of Magicians stage tricks, called; "Devil's Torture Chamber", and "Impalement" and other Penetration techniques: except in the case of the Black Secret Technique Machine One Shot, it doesn't create the illusion of being stabbed or impaled, the unfortunate victim actually does get impaled.
• The English name of this technique is a reference to the iron maiden, a coffin-like torture device with sharp spikes lining the inside. A victim is forced to stand straight up inside until they can no longer support themselves, at which point they are forced to lean forward or backward onto the spines, resulting in a slow and painful death.
• In Naruto: Ultimate Ninja Storm, Black Ant gets impaled in mid-air, is slammed into the ground, and then explodes.

References

1. ↑ Second Databook, page 219