| Name | Population | Altitude | Latitude | Longitude | 
Oasa : | 
 | 432 m | 34°46'0.1" N | 132°28'1.2" E | 
Oban : | 
 | 300 m | 34°52'0.1" N | 132°46'58.8" E | 
Obara : | 
 | 
 | 34°10'0.1" N | 132°26'60.0" E | 
Obatake : | 
 | 510 m | 34°42'0.0" N | 133°15'0.0" E | 
Obiro : | 
 | 73 m | 34°15'0.0" N | 132°37'1.2" E | 
Ocho : | 
 | 50 m | 34°10'59.9" N | 132°50'60.0" E | 
Ogata : | 
 | 100 m | 34°13'59.9" N | 132°13'1.2" E | 
Ogimi : | 
 | 
 | 34°10'0.1" N | 132°28'58.8" E | 
Oguna : | 
 | 400 m | 34°55'0.1" N | 133°7'1.2" E | 
Oguni : | 
 | 398 m | 34°37'0.1" N | 132°55'58.8" E | 
Ogu : | 
 | 326 m | 34°31'59.9" N | 132°55'1.2" E | 
Ohama : | 
 | 18 m | 34°19'59.9" N | 133°10'58.8" E | 
Ohara : | 
 | 
 | 34°10'0.1" N | 132°26'60.0" E | 
Ohiro : | 
 | 73 m | 34°15'0.0" N | 132°37'1.2" E | 
Oi : | 
 | 86 m | 34°19'59.9" N | 132°52'58.8" E | 
Ojizo : | 
 | 1 m | 34°10'0.1" N | 132°40'1.2" E | 
Okimi : | 
 | 
 | 34°10'0.1" N | 132°28'58.8" E | 
Okinogamicho : | 
 | 57 m | 34°28'59.9" N | 133°22'1.2" E | 
Oki-shinkai : | 
 | 10 m | 34°22'59.9" N | 132°25'58.8" E | 
Okonogami-machi : | 
 | 57 m | 34°28'59.9" N | 133°22'1.2" E | 
Oko : | 
 | 
 | 34°4'59.9" N | 132°26'60.0" E | 
Okuna : | 
 | 400 m | 34°55'0.1" N | 133°7'1.2" E | 
Okuni : | 
 | 398 m | 34°37'0.1" N | 132°55'58.8" E | 
Okushi : | 
 | 
 | 34°13'59.9" N | 132°50'60.0" E | 
Omachi : | 
 | 86 m | 34°22'59.9" N | 133°13'1.2" E | 
Omotegawa : | 
 | 397 m | 34°51'0.0" N | 133°4'58.8" E | 
Ondo : | 
 | 47 m | 34°10'59.9" N | 132°31'58.8" E | 
Onomichi (Onomichi) : | 90 937 | 91 m | 34°25'0.1" N | 133°11'60.0" E | 
Onomiti : | 
 | 91 m | 34°25'0.1" N | 133°11'60.0" E | 
Ono (Ono) : | 26 191 | 22 m | 34°16'59.9" N | 132°16'1.2" E | 
Onuka : | 
 | 826 m | 34°58'59.9" N | 133°11'60.0" E | 
Oshigome : | 
 | 197 m | 34°19'0.1" N | 132°34'1.2" E | 
O-shingai : | 
 | 38 m | 34°13'59.9" N | 132°37'1.2" E | 
O-shinkai : | 
 | 38 m | 34°13'59.9" N | 132°37'1.2" E | 
Osugacho : | 
 | 63 m | 34°23'60.0" N | 132°28'1.2" E | 
Osukacho : | 
 | 63 m | 34°23'60.0" N | 132°28'1.2" E | 
Osukamachi : | 
 | 63 m | 34°23'60.0" N | 132°28'1.2" E | 
Osuka : | 
 | 63 m | 34°23'60.0" N | 132°28'1.2" E | 
Osu : | 
 | 16 m | 34°16'59.9" N | 132°25'58.8" E | 
Otomo : | 
 | 300 m | 34°52'0.1" N | 132°46'58.8" E | 
Otsuki : | 
 | 336 m | 34°53'60.0" N | 132°52'58.8" E | 
Otyo : | 
 | 50 m | 34°10'59.9" N | 132°50'60.0" E | 
Oura : | 
 | 100 m | 34°10'59.9" N | 132°45'0.0" E | 
Ozu : | 
 | 16 m | 34°16'59.9" N | 132°25'58.8" E | 
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