- Name: Barrier Encampment Method (結界法陣, Kekkai Hōjin; English TV "Perimeter Barrier Jutsu")
- Type: B-rank, Offensive
- Users: Sound Four, Third Hokage (Naruto: Narutimate Hero 3)
- Debut (Anime): Naruto Episode 111
- Debut (Manga): Naruto Chapter 185
An array of four explosive tags are jointly placed around the boundary of an area. If anyone or anything happens to walk through the boundary, the seals will instantly activate and explode, killing the imprisoned target. The Third Hokage can use this jutsu in Naruto: Narutimate Hero 3 with the use of shadow clones. Iruka Umino uses an advanced version in the anime called Sealed Bomb Square Release.
- Second Databook, page 220