|Kikai no Jōmon|
|English||The Gate of Turtle Shell|
Kikai no Jōmon (亀鎧の城門, The Gate of Turtle Shell) is a Kidō spell. It was one of the techniques used by Hachigen Ushōda during an attempt to defeat Baraggan Louisenbairn. While both the number and classification of this particular spell is not explicitly stated, it most resembles a Bakudō (binding) spell. It was developed by Hachigen Ushōda after he became a Visored.
This barrier is created by many small hexagons combining to form a honeycomb-like structure. It can be used in conjunction with Ryubi no Jōmon, Koko no Jōmon, and Hoyoku no Jōmon to form Shiji no Saimon.