Naruto's Nine-Tails fighting against the Chibaku Tensei (Image via Shueisha) Naruto unleashed more power from the Nine-Tails to shatter the Chibaku Tensei, entering an eight-tailed transformation.

Naruto thought as much and was overcome with anger. As a result, Naruto unleashed the Nine-Tails' chakra for the first time. The seal weakened to where the fox's face and chakra became visible.