- Ogunimachi-nanokamachi
- Ogunimachi-nihon’yanagi
- Ogunimachi-ōgai
- Ogunimachi-yamanota
- Ōnuma-shinden
- Ōakasawa
- Ōta-shinden
- Ōwarino
- Ōbuchi
- Ōdōri
- Ōgata-honchō
- Okashinden
- Ōnomachi
- Ojiya
- Ōdomari
- Ogi
- Ogi-kaneta-shinden
- Ogi-kinoura
- Ogi-kowashimizu
- Ogi-ōura
- Ogimachi
- Onomi
- Ōsugi
- Ōta
- Obiori
- Ogibori
- Ogi
- Otomo
- Otoji
- Obirō