Shiki Fujin

This technique, mentioned only in passing by Hatake Kakashi, is the method the Fourth Hokage used to seal a portion of his own chakra inside of Naruto. This allowed him to reseal the Seal on the Kyuubi when Naruto had undertaken the Eight-Tails Transformation. It lasted long enough for him to have a short chat with his son, and then the chakra that allowed the Fourth to materialize sent itself.
 * Name: Shiki Fujin
 * Type: Fuinjutsu
 * Users: Minato Namikaze
 * Hand Seals: Unknown
 * Debut (Anime): N/A
 * Debut (Manga): N/A