O
Ō
- (Kōshi Shi) Ōike
- (Kōshi Shi) Ōikegoya
- (Kuma-gun) Ōyabu
- (Ashikita-gun) Ōdo
- (Ashikita-gun) Ōte
- (Minamata Shi) Ōsako
- (Minamata Shi) Ōtosako
- (Minamata Shi) Ōno
- (Minamata Shi) Ōyabu
- (Minamata Shi) Ōmori
- (Minamata Shi) Ōkubo
- (Minamata Shi) Ōzonochō
- (Arao Shi) Ōhiramachi
- (Minamata Shi) Ōkawa
- (Tamana Shi) Ōhamamachi
- (Kumamoto Shi) Ōe
- (Kamiamakusa Shi) Ōyanomachi-noboritate