The Rakuroo clan that had strong political power throughout the Rakuro area is said to have originated in the Qi dynasty (Shandong Province, China) and colonized the mountains in Rakuro after escaping from the Qi dynasty civil wars in the B.C. 170's.
楽浪の時代を通じて強力な勢力をもった楽浪王氏は斉（中国山東省）の出自といわれ、前一七〇年代に斉の内乱を逃れて楽浪の山中に入植したものという。