|Kokō no Jōmon|
|English||The Gate of Tiger Fang|
|Signature User||Hachigen Ushōda|
Kokō no Jōmon (虎咬の城門, The Gate of Tiger Fang; Viz "Tiger Bite Castle Gate") is a Kidō spell.
A barrier appears and takes the shape of a watermill. Its inner section can be opened up like a set of fangs, allowing one to attack through the barrier. It can be used together with Ryūbi no Jōmon, Kigai no Jōmon, and Hōyoku no Jōmon to form Shijū no Saimon.