ABDEFGHIJKMNOSTUYZ O Obarai Obi-eki Obirano Okatomi Okita-damu Oryūzako Oryūzako-eki Ōdōtsu Ōdōtsu-eki Ōfurukawa Ōkawachi Ōkubo Ōseuchi-damu Ōuchibaru-damu Ōyodogawa Dai-2-damu