Barrier Method Formation

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 detonate when the intruder reaches the centre, killing the imprisoned target.

Trivia

 * According to a book that Shikaku Nara made his son read, the Barrier Method Formation is a high-class ninjutsu.
 * In the English dubbed version, Neji incorrectly claims that five tags are used in this technique, despite a cartoon depiction of it only showing four.
 * In Naruto Shippūden: Ultimate Ninja Storm Revolution and Naruto Shippūden: Ultimate Ninja Storm 4, Iruka Umino's String Light Formation is incorrectly named as this technique.