Ō
- (Murayama Shi) Ōkubo
- (Nishiokitama-gun) Ōishizawa
- (Yonezawa Shi) Ōsawa
- (Tsuruoka Shi) Ōiwagawa
- (Mogami-gun) Ōnida
- (Nishimurayama-gun) Ōsumi
- (Nishimurayama-gun) Ōya
- (Murayama Shi) Ōtorii
- (Mogami-gun) Ōashizawa
- (Mogami-gun) Ōsawa
- (Mogami-gun) Ōhori
- (Tsuruoka Shi) Ōyama
- (Yamagata-shi) Ōmori
- (Higashitagawa-gun) Ōnakajima
- (Mogami-gun) Ōtaki
- (Tsuruoka Shi) Ōami
- (Tsuruoka Shi) Ōtori
- (Akumi-gun) Ōwarabioka
- (Kitamurayama-gun) Ōishida