Jinno Ichou is the oldest of the four spears and like Shingo, Ichiou also holds a grudge against Kurogane Jinsuke for attacking the Myoujin School. For the last twevle years he also has been honing his skills so he can kill Jinsuke.
During his brief fight with Iori, he shows little skill with his spear and is immediately hit unconscious and has his ribs broken, without Iori even drawing his sword. He later gets up to try and retrieve his spear from Maniwa who took it from him when he and his team revealed themselves to the Ogame school
The Ginkan (Silver Gate Bar) is a long spear with a short shaft, none of the uses were shown due to Ichiou being beaten so quickly.