The user flows earth-natured chakra through all or parts of their body, causing it to become noticeably darker, all while increasing their defensive power to become as hard as diamond. As such, this allows the user to easily be able to withstand most attacks with little to no damage, with the exception of Lightning Release ninjutsu. Furthermore, the destructive power of physical attacks is increased, making this a great all-purpose technique.
Like the rest of Kakuzu's techniques, the name of this technique comes from the legendary mecha anime "Mobile Suit Gundam" (機動戦士ガンダム, Kidō Senshi Gandamu). The name Domu was taken from the Gundam MS-09BDom (ドム, Domu). The name was given kanji to create the name of this technique.