Renta Kamiyama (1972-) was a Japanese weapons dealer who lived in Naha, Okinawa during the 2000s. The older brother of Renji Kamiyama, he owned Kamiyama Works on Okinawa and both sold weapons from a van and tuned up old weapons at his office. In March 2008, he met his brother's associate Kazuma Kiryu as Kiryu prepared to storm the Tamashiro-gumi headquarters, and Kamiyama introduced Kiryu to his servicse and gave him an extendable staff for free, as he privately wished to help him destroy the Tamashiro Family.