In primo piano a b c d e f g h i j k l m n o p q r s t u v w x y z Ordine alfabetico O Ochiai Ogawa Ohara Oki Onoue Oshide Ōsono Oura Ōzō Ōbiki Ogui Oura Okiaka Shima Ōshima Ōhata Ōtaki Otani Oshigawa Okada Ōno-naka Onoda Ōta Okusasa Ōsumi Ochikata Ōzunaka Okano-kuro-shima Ōkuma Ono Ogura 1 2