Hakke no Fuuin Shiki (Eight Divination Signs Seal Style) v2 M/F Commands : sf1-10 Hakke no Fuuin Shiki was a Fuuinjutsu technique used by the Fourth Hokage. The Hakke no Fuuin Shiki was used in conjunction with the Shiki Fuujin technique to seal the Kyuubi demon within the stomach of Naruto. The Hakke no Fuuin Shiki allows the two Shishou Fuuin to leak the Kyuubi chakra back into Naruto's own chakra.