Byakuya Kuchiki and Kenpachi Zaraki coming through an open Senkaimon
The Senkaimon (穿界門, world penetration gate) is a dimensional gateway that allows Shinigami to travel from Soul Society by unlocking it. When a Shinigami is being guided by a Hell Butterfly the Senkaimon can take the form of a waiting room that can be entered and exited from via a set of sliding doors. Humans can also use this gate through the use of Reishihenkanki (霊子変換機, spirit exchangers) which can covert solid matter into Spirit Particles. The Tenkai Kecchu can be used to create a path between 4 specified points and can create an open soul unit area of radius that can swap something from the Human World to Soul Society. This method was used to stop Sōsuke Aizen from destroying the real Karakura Town. This was first seen when Byakuya Kuchiki told Renji Abarai to open one and did so by command.Renji opens the Senkaimon for himself, Byakuya and Rukia. The Senkaimon is used only for Soul Society citizens. (eg. Shinigami, Zanpakuto Spirits, Plus' etc)

However intruders of Soul Society can enter in the same manner. While this method is used, they commonly lack the use of a Hell Butterfly which ultimately causes them to have to travel through the Dangai (断界, prohibiting world) which is a dimension that links the Human World to the Shinigami World (This is not to be confused with Hueco Mundo). This is a far more volatile and dangerous method to use, as those that cannot pas through the gate in time are trapped in there forever, but it is possible for Seireitei to turn off all hostile devices to allow souls to travel through the Dangai safely, however have rarely needed to due to the use of the Hell Buttferfly. Although the Senkaimon is run by the Kidō Corps, during The New Captain Shūsuke Amagai it was shown that there are private Senkaimon owned by high ranked Noble Families.

Last edited by Dragoon on 12 April 2010 at 07:14
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