Translation: Earth Grudge Fear.
Hand Seals: None.
Description: Jiongu is a Ninjutsu technique used by the Waterfall missing-nin and Akatsuki member Kakuzu. After being shunned for his failure in an assassination mission, Kakuzu turned his anger against his village leaders, by stealing the village's most prized secret Kinjutsu. Jiongu created dark tendril masses within Kakuzu and allows him to steal the hearts of others, to extend his life and take the original owners elemental chakra affinity.
The hearts of four other slain shinobi are housed within these tendrils, granting him their elemental affinities. Each elemental spirit takes the form of a mask, black tendril mass and heart. Each elemental spirit can be controlled by Kakuzu either when within his body or outside. For outside the mask will burst the stitches on his back and then emerge to fight alongside him. Along with a Wind, Fire, Earth and Lightning elemental, is more than likely Kakuzu's own Water affinity. This grants him access to all five powerful elemental styles. These elementals can be killed if countered by a powerful enough opposing elemental attack which the element is weak against.
- Earth Mask: It is unknown what animal this mask was, as it was destroyed before it could be seen, but the heart had an earth-affinity. It allowed Kakuzu to use Doton • Domu.
- Fire Mask: This heart had a fire-affinity, and took on the shape of a demonic tiger. It could use Katon • Zukokku.
- Lightning Mask: This heart had a lightning-affinity, and took on the shape of some sort of deformed bipedal. It could use Raiton • Gian.
- Wind Mask: This heart had a wind-affinity, and took on a strange four-legged body with thin wings. It could use Futon • Atsugai.