Japón
Países del mundo
O
- (Kamiminochi-gun) Oneyamamachi
- (Higashichikuma Gun) Onmago
- (Matsumoto Shi) Okadamachi
- (Uozu Shi) Ogawaji
- (Toyama Shi) Ohara
- (Kanazawa-shi) Okushinbomachi
- (Nanto Shi) Omata
- (Himi Shi) Ogakuchi
- (Kashima Gun) Odake
- (Hakui Gun) Ogawa
- (Imizu Shi) Okitsukahara
- (Himi Shi) Ogume
- (Himi Shi) Otaki
- (Nonoichi-shi) Oshino
- (Nonoichi-shi) Okyōmachi
Ō
- (Kitaazumi Gun) Ōta
- (Kitaazumi Gun) Ōide
- (Kitaazumi Gun) Ōzōren
- (Nakaniikawa Gun) Ōshōzu
- (Toyama Shi) Ōshimizu
- (Nanto Shi) Ōshima
- (Nanto Shi) Ōkuzushima
- (Nomi Shi) Ōkuchimachi
- (Kahoku Shi) Ōsaki
- (Kahoku Gun) Ōnebu
- (Kanazawa-shi) Ōbamachi
- (Komatsu Shi) Ōsugimachi
- (Fukui-shi) Ōtoshichō
- (Fukui-shi) Ōmorichō
- (Fukui-shi) Ōkubochō