The Arima Clan was a Human Kazokan clan that existed on the Inner Rim world Kazoku. Prior to the Nihon Civil War, the clan was a minor clan within the Kono Clan's province until 1,603 BBY when the clan had overthrown the Kono Clan and effectively replaced them and established the Arima Shogunate in the process, becoming a member of the Shogunate Commission and held control over the Arima Province. The clan had several allies, including the Hinata and Shiori Shogunates, and the Kamisato and Nishina Clans, whom all supported them during the Nihon Civil War.
By 22 BBY, Arima Tokiyori was the clan's Shogun and patriarch who oversaw the Arima Provincial Council and a member of the Shogun Committee.