|Signature User||Tōshirō Hitsugaya|
Kyōmon (鏡門, Mirror Door) is a Kidō spell.
This technique erects a transparent barrier that extends from one side of an opening to the other. It is used to protect the target by preventing intruders from passing through it. It is usually used to cover the entrance of a room with the target inside it. However, this barrier is much more easily broken from the inside if the target chooses to leave confinement.