Renji Kamiyama is Kamurocho's Kamiyama Works owner. He tunes up and repairs weapons, and also sells DVDs to Kiryu that allow weapon modification. He is Renta Kamiyama's younger brother and is himself a fighter, using a pair of kali sticks in Kamurocho's "Weapon Master GP" underground fighting tournament under the nickname "The Weaponmaster".
Renji Kamiyama is virtually identical in appearance to his brother Renta, apart from having a green checked flannel shirt rather than a red one.
Renji Kamiyama likes to keep his private information private.
Yakuza 2/Yakuza Kiwami 2Edit
Kamiyama moves onto selling and crafting weapons and protective gear.
Kamiyama runs a shop from his van on a Kamurocho rooftop.
Yakuza: Dead SoulsEdit
Kamiyama has gotten hold of a truck with a half-length shipping container on the back. He has strengthened it to protect against any potential zombie attack, and runs his business from the container.