Regions of Japan
- Okutadami Hatsudensho
- Ōgusu Yama
- Oku-son
- Ōkushi Wan
- Ōkushi-wan
- Oku-shinden
- Ōkushi
- Ōkushi
- Okusenjō-dake
- Oku-sangai-dake
- Oku-sada
- Ōkuro Shima
- Ōkuro Saki
- Ōkurokami Jima
- Ōkura Yama
- Ōkura Yama
- Ōkura Gawa
- Okurabaru
- Ōkunri
- Okuno-uchi
- Ōkuno Shima
- Ōkuni
- Okuni
- Okunaro
- Okuna
- Ōkuma
- Ōkuma
- Okuma
- Okuma
- Oku-kureji
- Oku Kō
- Oku-hijiri-dake
- Okugawa-mura
- Okugano
- Ōkue-yama
- Oku-dainichi-dake
- Okuda
- Oku-chō
- Okuchi-wan
- Ōkuchi-shi
- Ōguchi Seto
- Ōkuchi
- Ōkuchi-shinohara
- Oku-chausu-yama
- Ōkubono-hana
- Ōkubo-mura
- Ōkubogumi
- Ōkubo
- Ōkubo
- Kokubo
- Ōkubochō-ōkubo
- Ōkubo-naka
- Ōkubo
- Ōkubo
- Okubi Shima
- Oku Eki
- Ōku
- Oku
- Oku
- Ōkōzu-mura
- Oko Ze
- Okoku
- Ōkoshima
- Okoshi-chō
- Okoshi
- Ōkomi
- Okoga Shima
- Ōkōchi-gawa
- Okobamachi
- Ōkō
- Okkawa
- Tonemachi-okkai
- Oki-yamanashi
- Okitsunome Jima
- Okitsu Gawa
- Okitsu-honchō
- Okita-saki
- Ōkita-guchi
- Oki-sone
- Oki-sone
- Oki-sone
- Okisō
- Oki Shotō
- Oki Shima
- Okino Shima
- Oki Shima
- Oki-se
- Oki-ō-sone
- Okinou-ze
- Okinoura
- Okinotori Shima
- Okino-su
- Okino-sone
- Okino-sone
- Okino-so
- Okino-shūri
- Okinoshima-mura
- Okino Shima
- Okino-shima
- Okino Shima
- Okino Shima
- Okino-shima
- Okino Shima
- Okino Shima
- Okino Shima
- Okino-shima
- Okino Shima
- Okino-shima
- Okino Shima
- Okino Shima
- Okino-se
- Okino-se
- Okino Se
- Okino-se
- Okino-se
- Okino-se
- Okino-se
- Okino-se
- Okino-se
- Okino-se
- Okino-sankaku
- Okinonaka-se
- Okinomutsu-se
- Okino-mo
- Okinome-sone
- Okino-me
- Okino-kuro-shima
- Nakanougan Jima
- Okinokajikake
- Okino-kajikake
- Okino-iso
- Okinohata-mura
- Okinohatamachi
- Okinohata Gawa
- Okino Hana
- Okinogozen Shima
- Okinogamichō
- Okinoerabujima Island
- Okidaitō Jima
- Okinawa Shotō
- Okinawa Shi
- Okinawa
- Okinawa
- Okinami Yama
- Okimuku Shima
- Okimi-gawa
- Ōgakichō-ōkimi
- Okimae
- Ōki Machi
- Oki Kojima
- Okikatsura-shima
- Okikamuro-jima
- Oki-kaikyō
- Okijima-minaminochō
- Okihira Jima
- Aboshiku-okinohama
- Okiguro-shima
- Oki-gun
- Gozen Iwa
- Okigahamada
- Okiakime Jima
- Oki
- Oki
- Ōki
- Okehasama
- Okegawa-shi
- Okegawa-machi
- Okegawa
- Ōkagō
- Okazaki-shi
- Okazaki
- Ōka Zaki
- Okaya Shi
- Okayama-suidō
- Okayama Shi
- Okayama-ken
- Okayama Heiya
- Okayama
- Okaya
- Ōkawa-shi
- Ōkawara
- Ōkawachō-ōkawano
- Ōkawa Mura
- Ōkawa-mura
- Yamashirochō-ōkawamochi
- Ohkawairi-yama
- Ōkawa-gun
- Ōkawachō
- Ōkawa-chō
- Ōkawachi-wan
- Ō-kawachi
- Ōkawachi
- Ō Kawa
- Ō-kawa
- Ō-kawa
- Ō Kawa
- Taiho Ōkawa
- Ōkawa
- Ōkawa
- Ōkawa