Iron Body


 * Name: Kurogane Karada, 鉄体, literally "Iron Body"
 * Type: Unknown
 * Users: Kakuzu

This earth-based jutsu causes Kakuzu's skin to harden, making him virtually invulnerable to physical attacks and enhancing his strength. Lightning-based jutsu can penetrate it, however, due to the natural weakness, earth-based jutsu have to avoid lightning techniques.