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Senkaimon

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Byakuya and Kenpachi using the Senkaimon.

The Senkaimon (穿界門; world penetration gate) is the dimensional gateway which Shinigami use to enter and leave Soul Society by unlocking it. When guided by a Hell Butterfly, the Senkaimon takes the form of a waiting room entered through a sliding door. Humans can also use such a gate through the use of Reishihenkanki (霊子変換機; spirit exchangers), which convert solid matter into spirit particles. The Tenkai Kecchu is a variant on this gate by using four linked points to create one spiritual unit of area radius that swaps something that it encircles with something else in Soul Society, as is done to Karakura Town to prevent Sōsuke Aizen from destroying it.[1]


Opening a Senkaimon

Intruders can pass through the Senkaimon in the same manner. While this method uses the same gate, the lack of a Hell Butterfly forces intruders to pass through the Dangai (断界; prohibiting world), a bordering dimension between the Human World and Soul Society (not to be confused with Hueco Mundo). This is much more dangerous to do, as souls that cannot pass through before the gate to Soul Society closes are trapped there forever. It is possible for Seireitei to deactivate these mechanisms, allowing Shinigami or Humans to traverse the Dangai safely. While the Senkaimon is run by the Kidō Corps, during the Shūsuke Amagai arc. it is shown that there are private Senkaimon owned by high ranking families.

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References

  1. Bleach manga; Chapter 315, page 6-7