O (Kumage-gun) Okuni (Mine Shi) Ofukuchō-shimo (Shimonoseki Shi) Ozukichō (Shimonoseki Shi) Oyama (Kumage-gun) Ozu (Shimonoseki Shi) Ozuki (Ōshima-gun) Oito Shima (Shimonoseki Shi) Oroshi-shinmachi (Yamaguchi Shi) Ogōri-shimogō Ogōri (Sanyōonoda Shi) Onoda Ō (Mine Shi) Ōminechō-nishibun (Hagi Shi) Ōi (Ōshima-gun) Ōshima (Yanai Shi) Ōbatake (Shimonoseki Shi) Ōtsubo-honmachi (Shūnan Shi) Ō-kawachi (Shūnan Shi) Ōshio (Mine Shi) Ōta (Nagato Shi) Ōura Ōtake