| A | Ba | Be | Bi | Bo | Bu | Cha | Chi | Cho | Chu | Da | De | Do | E | Fu | Ga | Ge | Gi | Go | Gu | Gyo | Ha | He | Hi | Ho | Hyo |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| i | Ji | Jo | Ju | Ka | Ke | Ki | Ko | Ku | Kyo | Kyu | Ma | Me | Mi | Mo | Mu | Myo | Na | Ne | Ni | No | Nu | Nyu | O | P | Ra |
| Re | Ri | Ro | Ru | Ryo | Ryu | Sa | Se | Sha | Shi | Sho | Shu | So | Su | Ta | Te | To | Tsu | U | Wa | Ya | Yo | Yu | Za | Ze | Zu |
| Oh-amiShirasato town Sanbu Chiba | Oh-arai town Higashi-ibaraki ibaraki | ex-Oh-asa town Yamagata Hiroshima | Obama city Fukui | ex-Obama town MinamiTakaki Nagasaki | Obanazawa city Obanazawa city 2 Yamagata |
| ex-Obara village NishiKamo Aichi | ex-Obata town Watarai Mie | ex-Ohbatake town Kuga Yamaguchi | Obihiro city Chinese, Korean) Tokachi Hokkaido | Obira town Rumoe Hokkaido | Aichi |
| Obuse town KamiTakai Nagano | Ochi town Takaoka Kohchi | ex-Ohchi town Ohchi town 2 HigashiMatsuura Saga | ex-Ohchi town Ohchi Shimane | ex-Ohchi town Ohkawa Kagawa | ex-Ochiai town Maniwa Okayama |
| ex-Oda town KamiUkena Ehime | Ohda city Shimane | Ohdai town Taki Mie | Ohdate city Akita | ex-Odaka town Sohma Fukushima | Odawara city Kanagawa |
| Oh-e town NishiMurayama Yamagata | ex-Oh-e town Oh-e town 2 Kasa Kyoto | Ohfunato city iwate | ex-Ohgata town Hata Kohchi | Oga city Akita | ex-Ogachi town Ogachi Akita |
| Ohgaki city Chinese, Korean, Portuguese Gifu | ex-Ohgaki town Saiki Hiroshima | Ogano town Chichibu Saitama | ex-Ogasa town Ogasa Shizuoka | Ogasawara islands Tokyo | ex-Ohgata town Ohgata town 2 NakaKubiki Niigata |
| Ohgata village MinamiAkita Akita | Ohgawara town Shibata Miyagi | ex-Ogata town Ohno Oh-ita | ex-Ogatsu town Monoh Miyagi | ex-Ogawa town Higashi-ibaraki ibaraki | Ogawa town Hiki Saitama |
| ex-Ogawa town Nasu Tochigi | ex-Ogawa town ShimoMashiki Kumamoto | ex-Ogawa village Naka ibaraki | Ogawa village KamiMinochi Nagano | ex-Ogi town Sado Niigata | Ogi town Naoiri Oh-ita |
| Ogi city ex-Ogi town Ogi Saga | Ogi town Sado Niigata | Ohgimi village Kunigami Okinawa | ex-Ohgo town Seta Gunma | ex-Ohgoe town Tamura Fukushima | Ogo-ori city Fukuoka |
| ex-Ogo-ori town Yoshiki Yamaguchi | Ogose town iruma Saitama | ex-Oguchi village ishikawa ishikawa | Ohguchi town Niwa Aichi | Oguni town Aso Kumamoto | ex-Oguni town Kariwa Niigata |
| Oguni town NishiOkitama Yamagata | ex-Oh-hara town Aida Okayama | ex-Oh-hara town isumi Chiba | Oh-haru town Ama Aichi | ex-Oh-hasama town Hienuki iwate | ex-Oh-hata town Shimokita Aomori |
| Oh-hira village Kurokawa Miyagi | Oh-hira town ShimoTsuga Tochigi | ex-Oh-hito town Tagata Shizuoka | Oh-i town Ashigarakami Kanagawa | ex-Oh-i town iruma Saitama | Oh-i town Oh-i town 2 Oh-i Fukui |
| Oh-igawa town Shida Shizuoka | Oirase town Kamikita Aomori | Oh-ishida town KitaMurayama Yamagata | Oh-iso town Chinese, Korean Naka Kanagawa | Oh-ita prefecture Chinese, Korean Oh-ita | Oh-ita city Chinese, Korean Oh-ita |
| ex-Oiwake town Yuhfutsu Hokkaido | Oh-izumi town Oura Gunma | ex-Oh-izumi village Oh-izumi village 2 Kitakoma Yamanashi | Ohji town KitaKatsushida Nara | Ojika town KitaMatsuura Nagasaki | ex-Ojima town Nitta Gunma |
| Ojiya city Niigata | |||||
| ex-Okabe town Ohsato Saitama | Okabe town Shida Shizuoka | Okagaki town Onga Fukuoka | ex-Okahara village Kuma Kumamoto | Ohkawa city Fukuoka | ex-Ohkawa town Ohkawa Kagawa |
| Ohkawa village Yusuhara Kohchi | ex-Ohkawachi town Kanzaki Hyohgo | Okaya city Portuguese Nagano | Okayama city Chinese, Korean Okayama | Okayama prefecture Chinese, Korean Okayama | Okazaki city Chinese,Portuguese Aichi |
| Okegawa city Saitama | Oketo town Tokoro Hokkaido | Ohki town Mizuma Fukuoka | ex-Okimi town Saiki Hiroshima | Okinawa city Okinawa | Okinawa prefecture Chinese, Korean, Portuguese, Spanish, French, German, Russian Okinawa |
| Okinoshima town Oki Shimane | Okoppe town Monbetsu Hokkaido | ex-Oku town Oku Okayama | Okuizumo town Nita Shimane | ex-Ohkuchi city Kagoshima | Ohkuma town Futaba Fukushima |
| Ohkura village Mogami Yamagata | Okushiri town Okushiri Hokkaido | Okutama town NishiTama Tokyo | ex-Okutsu town Tomata Okayama | Ohkuwa town Kiso Nagano | Ohma town Shimokita Aomori |
| Ohmachi city Nagano | Ohmachi town Kishima Saga | Omaezaki city Portuguese ex-Omaezaki town Haibara Shizuoka | ex-Ohmagari city Akita | ex-Ohmama town Yamada Gunma | Ohme city Tokyo |
| Omi village HigashiChikuma Nagano | ex-Ohmi town Sakata Shiga | ex-Omigawa town Katori Chiba | OhmiHachiman city Shiga | ex-Ohmishima town Ochi Ehime | Omitama city ibaraki |
| Ohmiya ward ex-Ohmiya city Saitama Saitama | ex-Ohmiya town Naka ibaraki | Ohmiya town Naka Kyoto | ex-Ohmiya town Watarai Mie | ex-Omogo village KamiUkena Ehime | ex-Omonogawa town Hiraka Akita |
| ex-Ohmori town Hiraka Akita | ex-Omotegoh village NishiShirakawa Fukushima | Ohmu town Monbetsu Hokkaido | Ohmura city (Portuguese) Nagasaki | Ohmuta city Chinese, Korean Fukuoka | Onagawa town Oshika Miyagi |
| Ohnan town | ex-Onbetsu town Shiranuka Hokkaido | ex-Ondo town Aki Hiroshima | ex-Ohnejime town Kimotsuki Kagoshima | Onga town Onga Fukuoka | ex-Oniishi town Tano Gunma |
| ex-Ohnishi town Ochi Ehime | Onjuku town isumi Chiba | On-na village Kunigami Okinawa | Ono city Hyohgo | Ono town Tamura Fukushima | Ohno city Fukui |
| Ohno town ibi Gifu | ex-Ohno town Ohno Oh-ita | ex-Ohno town Kameda Hokkaido | ex-Ohno town Saiki Hiroshima | ex-Ohno village Kunohe iwate | ex-Ohno village Kashima ibaraki |
| ex-Onoda city Yamaguchi | ex-Onoda town Kami Miyagi | ex-Onoe town MinamiTsugaru Aomori | ex-Onogami village KitaGunma Gunma | ex-Ohnohara town Mitoyo Kagawa | Ohnojoh city Fukuoka |
| ex-Ohnomi village Takaoka Kohchi | Onomichi city Hiroshima | Onsen town Mikata Hyohgo | |||
| ex-Oh-oka village Oh-oka village 2 Sarashina Nagano | Ohra town Portuguese Oura Gunma | ex-Ohsa town Atetsu Okayama | ex-Osafune town Oku Okayama | Osaka metropolitan prefecture Chinese, Korean Osaka | ‹ŒEOsaka town Osaka town 2 Masuda Gifu |
| Osaka city Chinese, French, Korean Portuguese, Spanish Osaka | OhsakaSayama city Osaka | Ohsaki city Chinese, Korean Miyagi | Ohsaki town So-o Kagoshima | OhsakiKamishima town ex-Osaki town Toyota Hiroshima | Ohsato town Kurokawa Miyagi |
| ex-Ohsato town Ohsato Saitama | ex-OhSawano town KamiNiikawa Toyama | ex-Ohseto town NishiSonogi Nagasaki | Oshamanbe town Yamakoshi Hokkaido | ex-Oshika town Oshika Miyagi | Ohshika village Shimo-ina Nagano |
| Oshima General Subprefectural Bureau ex-Oshima branch Hokkaido | Ohshima town Tokyo | ex-Ohshima town NishiSonogi Nagasaki | ex-Ohshima town Ohshima Yamaguchi | ex-Ohshima town Toyama | ex-Ohshima village HigashiKubiki Niigata |
| ‹Œ¥Ohshima village KitaMatsuura Nagasaki | ex-Ohshima village Munakata Fukuoka | Oshimizu town Hakui ishikawa | Oshino village MinamiTsuru Yamanashi | Ohshuh city iwate | ex-Ohsuka town Ogasa Shizuoka |
| ex-Ohsumi town So-o Kagoshima | ex-Ota town Nyuh Fukui | Ohta city Chinese, Portuguese, Spanish Gunma | ex-Ohta town Senboku Akita | ex-Ohta village NishiKunisaki Oh-ita | Ohta ward Chinese, Korean Tokyo |
| Ohtake city Hiroshima | Ohtaki town isumi Chiba | ex-Ohtaki town Usu Hokkaido | ex-Ohtaki village Chichibu Saitama | Ohtaki village Chinese, Korean Kiso Nagano | Ohtama village Adachi Fukushima |
| Otari village KitaAzumi Nagano | Otaru city Chinese Korean Hokkaido | Ohtawara city Chinese, Korean, Portguguese, Spanish Tochigi | Ohtoh town Tagawa Fukuoka | ex-Ohtoh village NishiMuro Wakayama | ex-Ohtoh village Yoshino Nara |
| Otobe town Nishi Hokkaido | Otofuke town Katoh Hokkaido | Otoineppu village Nakagawa Hokkaido | ex-Ohtone town KitaSaitama Saitama | ex-Otowa town Hoi Aichi | Ohtoyo town Nagaoka Kohchi |
Nagaoka Kohchi | Ohtsu city Korean, Chinese, Deutsch, Korean, Portuguese Shiga | Ohtsuchi town Kami-Hei iwate | Ohtsuki city Yamanashi | Ohtsuki town Hata Kohchi | ex-Oh-uchi town Yuri Akita |
| ex-Oh-uda town Uda Nara | ex-Oh-ura town Kawanabe Kagoshima | ex-Oh-uchiyama village Watarai Mie | ex-Oumi town NishiKubiki Niigata | Ohwani town MinamiTsugaru Aomori | OwariAsahi city Aichi |
| Owase city Mie | ex-Oh-ya town to Yabu city Yabu Hyohgo | Oyabe city Toyama | Oyama city Tochigi | Oyama town Suntoh Shizuoka | ex-Oh-yama town Hita Oh-ita |
| ex-Oh-yama town KamiNiikawa Toyama | ex-Oh-yamada village Ayama Mie | Oh-Yamasaki town Oh-Yamasaki town 2 Otokuni Kyoto | Oh-yodo town Yoshino Nara | ex-Oh-yano town Amakusa Kumamoto | ex-Ohzato village Shimajiri Okinawa |
| Ohzora town Abashiri Hokkaido | Ohzu city Chinese, Korean Ohzu city 2 Ehime | Ohzu town (Chinese, Korean) Kikuchi Kumamoto | |||