|Earth Release: Hardening Technique|
|Rōmaji||Doton: Kōka Jutsu|
|English anime||Earth Style: Petrifying Jutsu|
|Anime||Naruto Shippūden Episode #196|
|Movie||Naruto Shippūden the Movie|
|Appears in||Anime, Movie|
|Class||Offensive, Defensive, Supplementary|
|Range||Short to Mid range|
By utilising earth-based chakra, the user encases their body in surrounding rock creating an armour. This casing can also be used to create extendible weapons to strike a target with.
Sadai has demonstrated that he could use the armour to alter his physical appearance, akin to a costume and mask, giving himself a larger physique and different face. However, his usage also adds weight to him, slowing him down.