|English||Quad Burial Barrier|
Shisō Kekkai (四葬結界, Quad Burial Barrier) is a Kidō spell. It was the technique used by Genryūsai Shigekuni Yamamoto to seal Kōga Kuchiki several hundred of years before the events of the Zanpakutō Unknown Tales arc. While both the number and classification of this particular spell is not expressly stated, it most resembles a Bakudō spell.
This technique seals and locks away a person. Before it is invoked, four spears are used to trap the target by their hands and legs. Once invoked, the target rises up into the sky and is then sealed in a black coffin-like box with chains wrapping around it. The four spears then pierce the box all at once. It is seemingly able to keep a person sealed for several hundreds of years.