Japón

Ō

• (Shiroishi Shi) Ōtakasawa-misawa
• (Minamiaizu-gun) Ōhara
• (Minamiaizu-gun) Ōmomo
• (Gosen Shi) Ōkura
• (Niigata Shi) Ōbuchi
• (Niigata Shi) Ōnomachi
• (Niigata Shi) Ōdōri
• (Uonuma Shi) Ōsawa
• (Minamiuonuma Shi) Ōkura
• (Kashiwazaki Shi) Ōsawa
• (Nagaoka Shi) Ōnuma-shinden
• (Sado Shi) Ōdomari

O

• (Shibata Shi) Otoji
• (Niigata Shi) Okashinden
• (Sanjō Shi) Ogibori
• (Uonuma Shi) Obirō
• (Uonuma Shi) Oritate-matashinden
• (Nagaoka Shi) Ogunimachi-yamanota
• (Santō-gun) Otomo
• (Nagaoka Shi) Ogunimachi-ōgai
• (Nagaoka Shi) Ogunimachi-ainohara
• (Nagaoka Shi) Ogunimachi-nihon’yanagi
• (Kashiwazaki Shi) Onadani
• (Yokosuka Shi) Oppama-honchō
• (Yokosuka Shi) Oppama-higashichō
• (Sado Shi) Ogi-kaneta-shinden
• (Sado Shi) Ogi-ōura
• (Sado Shi) Ogi-kinoura
• (Sado Shi) Ogi-kowashimizu
• (Yokohama Shi) Ottomochō