 | Okuyama Masumi |
 | Oranges |
 | Ouchi Rika |
 | Otawara Makoto |
 | Ooba Eimi |
 | Orin-chan |
 | Oki Kou |
 | Ooshige Masami |
 | Ore wa Saikyou, Zenki-sama I Am the Strongest, Zenki-sama |
 | Oda Nobunaga |
 | Okazaki Kyoko |
 | Oribe Aoi |
 | Ozaki Isamu |
 | Otsuka Mayu |
 | Ogata Eiji |
 | Oda Yusuke |
 | Okuzaki Akira |
 | Oozora Nozomu |
 | Ohm |
 | Officer Yamamoto |
 | Ozaki Isamu |
 | Ogasawara Muneyoshi |
 | One more time, one more chance Ещё один раз, ещё один шанс One more time, one more chance |
 | Oyasan |
 | Oda Hideji |
 | Ohno Kanako |
 | Ordineil Alphonce |
 | Ohwasa Satoshi |
 | Ohtori Akio |
 | Officer Morita |
 | O Neil April |
 | Ota Rikako |
 | Oozora Ibari |
 | Orina |
 | Overnight Sensation ~Jidai Wa Anata Ni Yudaneteru~ Overnight Sensation ~The world is entrusted to you~ |
 | Otonashi Ikuko |
 | Ominae Yu |
 | Omegamon |
 | Opening narration |
 | Orsay |
 | Oki Kazutoshi |
 | officer C |
 | Oyuki |
 | Okahori Satoru |
 | Ooishi Kuraudo |
 | Oshichau zo!! i'll give you a push!! |
 | Osono |
 | One Piece: Kinkyuu Kikaku One Piece Kanzen Kouryakuhou One Piece: Emergency Planning, A Perfect Strategy for the One Piece |
 | Oda Nobunaga |
 | Ootori Yoshio |
