Ō
- (Imabari-shi) Ōmi Shima
- (Nishiuwa-gun) Ōhama
- (Nishiuwa-gun) Ōe
- (Nishiuwa-gun) Ōku
- (Nishiuwa-gun) Ōsada
- (Imabari-shi) Ōnishichō-befu
- (Imabari-shi) Ōhama
- (Kita-gun) Ōguki
- (Saijō Shi) Ōmachi
- (Imabari-shi) Ōnishi
- (Uwajima-shi) Ōrabana
- (Uwajima-shi) Ōshima
- (Imabari-shi) Ōshinden
- (Saijō Shi) Ōtō
- (Uwajima-shi) Ōuchi
- (Iyo-shi) Ōhira
- (Imabari-shi) Ōge Jima
- (Imabari-shi) Ōihama
- (Ōzu-shi) Ōzu