Murakami is an employee that runs the operations at Ichijō's casino.

He acts as Ichijō's right-hand man and is the only other person entrusted with the responsibility of adjusting the nail settings on the Bog. Anything that Ichijō needs doing, he is the first man he orders to get things done around the casino.

Similar to the role of Odagiri, he mainly acts as the audience surrogate for Ichijō to question himself on how Kaiji manages to defeat each barrier built into his pachinko machine.