|Koko no Jōmon|
|English||The Gate of Tiger Fang|
Koko no Jōmon (虎咬の城門, The Gate of Tiger Fang) 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 expressly stated, it most resembles a Bakudō (binding) spell. It was developed by Hachigen Ushōda after he became a Visored.
A barrier appears out of nowhere and takes the shape of a watermill. It's inner section can be opened up like a set of fangs allowing one to attack through the barrier. It can be used together with Ryubi no Jōmon, Kikai no Jōmon, and Hoyoku no Jōmon to form Shiji no Saimon.