- Name: Black Secret Technique Machine One Shot (黒秘技機々一発, Kurohigi Kiki Ippatsu; English TV "Secret Black Move: Iron Maiden")
- Type: B-rank, Offensive, Short range (0-5m)
- Users: Kankuro, with Kuroari and Karasu
- Debut (Anime): Naruto Episode 125
- Debut (Manga): Chapter 214
First the opponent must be trapped in the torso of Kuroari. After this is accomplished, Karasu separates into about eight components, each with a sharp blade. Kankuro guides the separate pieces into slits in Kuroari's torso, impaling the victim inside.
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 center jump out.