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This article, Wood Release: Four Pillars Prison Technique, contains content taken directly from our mother site. All credit of such content is reserved the original authors over at Narutopedia, the original article can be read here: "Wood Release: Four Pillars Prison Technique".
The user changes chakra into timber under the ground and makes it grow rapidly, while forming it into a wooden prison. The size of the prison is based on the user's imagination. From an insect cage to a great prison, one can make it into whatever they want by regulating the amount of chakra used. The timber itself is treated with a chakra coating, making its destruction extremely difficult. During war, it has the great ability to detain prisoners, but it can also be used as a disciplinary measure for quarrelling subordinates.