Yukinobu Iihara

is a prisoner of Seito.
==History==
When Gentoku got taken to prison cell of Namba Heavy Industries' detention facility for those with low Hazard Levels, where he meet Iihara and three other prisoners (which two of them are his underlings) were held together, after his underling wake up Gentoku. Iihara, who already displaying his hatred for Gentoku, told him he's now like the rest of them, a stray dog, but Gentoku told him not to compare him with the rest. As Iihara mock Gentoku's for lack of manners, he gestured his two underlings to grab Gentoku and forced him to his knees. Iihara then shoved the screaming Gentoku's head on the floor and squeezed it hard, telling him to scream more, which Gentoku refused as he groaned. By morning, Gentoku refused to give Iihara his bread, forcing himself and his two underlings to attack Gentoku, which ended with Gentoku coughing up blood. Lying in pain on the floor as Iihara took his bread.
That night, Iihara and his two underlings continued their assault on Gentoku as he refused to comply with the lead inmate. Gentoku pleaded for them to stop, but Iihara continued to hit him before preparing to perform a cruel act, but only for him to be stopped by Jiro request to stop. As Iihara seized Jiro, he told his two underlings to let Gentoku go before he fell to the floor. Refusing to comply with Iihara request to attack Jiro, Gentoku remained on the floor shaking as Iihara shoved Jiro next to Gentoku, telling him to hit him. As he turned to see Jiro agreed to Iihara demand, Gentoku stated they both lost the lottery as he rose up and complied with Iihara demand, punching Jiro multiple times before he fell down. Pumped by adrenaline, Gentoku continued to punch Jiro, even when Iihara told him to stop. Turning his attention to his oppressor, Gentoku attacked him, which lead Iihara and his underlings to begin their attack on Gentoku once more until he lost consciousness, all of which was being watched by Utsumi from the camera.
His status after that is unknown, it persume that he possibly get dragged to an isolated section of the facility to fight the prisoners to the death.
==Appearances==
* Kamen Rider Build
**ROGUE
***Second Chapter: DARK NIGHT FALL
==References==
Category:Kamen Rider Build
Category:Villains
Category:Build Characters
Category:Namba Heavy Industries Ltd.
Category:Special-exclusive Characters
Category:Special-exclusive Villains