Name: Barrier Encampment Method (結界法陣, Kekkai Hōjin; English TV "Perimeter Barrier Jutsu")
Type: B-rank, Offensive
Users: Sound Four, Hiruzen Sarutobi*
Debut (Anime):Naruto Episode 111
Debut (Manga): 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.
* Hiruzen Sarutobi can use this jutsu in Naruto: Narutimate Hero 3 with the use of shadow clones.