Postal codes in Ichihara-shi, Chiba
千葉県市原市 — 223 postal codes. General code: 290-0000. Local government code 12219.
Address example
1-2-3 Aikawa, Ichihara-shi, Chiba 290-0252, Japan
〒290-0252 千葉県市原市相川1-2-3
Replace 1-2-3 with the chome-ban-go (block and lot) number, and add the building and room number before it.
| Postal code | Town / English address |
|---|---|
| 290-0000 | (any other address in this municipality) （下に掲載がない場合） Ichihara-shi, Chiba 290-0000, Japan |
| 290-0252 | Aikawa 相川 Aikawa, Ichihara-shi, Chiba 290-0252, Japan |
| 299-0117 | Aobadai 青葉台 Aobadai, Ichihara-shi, Chiba 299-0117, Japan |
| 299-0102 | Aoyagi 青柳 Aoyagi, Ichihara-shi, Chiba 299-0102, Japan |
| 299-0103 | Aoyagi Kaigan 青柳海岸 Aoyagi Kaigan, Ichihara-shi, Chiba 299-0103, Japan |
| 299-0101 | Aoyagikita 青柳北 Aoyagikita, Ichihara-shi, Chiba 299-0101, Japan |
| 290-0509 | Akuya 安久谷 Akuya, Ichihara-shi, Chiba 290-0509, Japan |
| 290-0251 | Asaikomukai 浅井小向 Asaikomukai, Ichihara-shi, Chiba 290-0251, Japan |
| 290-0063 | Asahigosho 旭五所 Asahigosho, Ichihara-shi, Chiba 290-0063, Japan |
| 290-0253 | Azu 安須 Azu, Ichihara-shi, Chiba 290-0253, Japan |
| 290-0535 | Asobara 朝生原 Asobara, Ichihara-shi, Chiba 290-0535, Japan |
| 299-0111 | Anesaki 姉崎 Anesaki, Ichihara-shi, Chiba 299-0111, Japan |
| 299-0107 | Anesakikaigan 姉崎海岸 Anesakikaigan, Ichihara-shi, Chiba 299-0107, Japan |
| 299-0119 | Anesakinishi 姉崎西 Anesakinishi, Ichihara-shi, Chiba 299-0119, Japan |
| 299-0110 | Anesakihigashi 姉崎東 Anesakihigashi, Ichihara-shi, Chiba 299-0110, Japan |
| 290-0207 | Amaariki 海士有木 Amaariki, Ichihara-shi, Chiba 290-0207, Japan |
| 299-0126 | Amoda 天羽田 Amoda, Ichihara-shi, Chiba 299-0126, Japan |
| 290-0522 | Arai 新井 Arai, Ichihara-shi, Chiba 290-0522, Japan |
| 290-0257 | Araoi 新生 Araoi, Ichihara-shi, Chiba 290-0257, Japan |
| 290-0212 | Aramaki 新巻 Aramaki, Ichihara-shi, Chiba 290-0212, Japan |
| 290-0037 | Iinuma 飯沼 Iinuma, Ichihara-shi, Chiba 290-0037, Japan |
| 290-0516 | Ikewada 池和田 Ikewada, Ichihara-shi, Chiba 290-0516, Japan |
| 290-0511 | Ishikawa 石川 Ishikawa, Ichihara-shi, Chiba 290-0511, Japan |
| 290-0534 | Ishigami 石神 Ishigami, Ichihara-shi, Chiba 290-0534, Japan |
| 290-0537 | Ishizuka 石塚 Ishizuka, Ichihara-shi, Chiba 290-0537, Japan |
| 299-0114 | Izumidai 泉台 Izumidai, Ichihara-shi, Chiba 299-0114, Japan |
| 290-0204 | Isogaya 磯ケ谷 Isogaya, Ichihara-shi, Chiba 290-0204, Japan |
| 290-0543 | Itabu 飯給 Itabu, Ichihara-shi, Chiba 290-0543, Japan |
| 290-0015 | Ichihara 市原 Ichihara, Ichihara-shi, Chiba 290-0015, Japan |
| 290-0505 | Ichiba 市場 Ichiba, Ichihara-shi, Chiba 290-0505, Japan |
| 290-0262 | Itohisa 糸久 Itohisa, Ichihara-shi, Chiba 290-0262, Japan |
| 290-0166 | Inunari 犬成 Inunari, Ichihara-shi, Chiba 290-0166, Japan |
| 299-0106 | Imazuasayama 今津朝山 Imazuasayama, Ichihara-shi, Chiba 299-0106, Japan |
| 290-0265 | Imadomi 今富 Imadomi, Ichihara-shi, Chiba 290-0265, Japan |
| 299-0115 | Iriyamazu 不入斗 Iriyamazu, Ichihara-shi, Chiba 299-0115, Japan |
| 290-0228 | Iwa 岩 Iwa, Ichihara-shi, Chiba 290-0228, Japan |
| 290-0047 | Iwasaki 岩崎 Iwasaki, Ichihara-shi, Chiba 290-0047, Japan |
| 290-0046 | Iwasaki Nishi 岩崎西 Iwasaki Nishi, Ichihara-shi, Chiba 290-0046, Japan |
| 290-0052 | Iwanomi 岩野見 Iwanomi, Ichihara-shi, Chiba 290-0052, Japan |
| 290-0222 | Uehara 上原 Uehara, Ichihara-shi, Chiba 290-0222, Japan |
| 290-0225 | Ushiku 牛久 Ushiku, Ichihara-shi, Chiba 290-0225, Japan |
| 290-0221 | Umatate 馬立 Umatate, Ichihara-shi, Chiba 290-0221, Japan |
| 290-0171 | Uruido 潤井戸 Uruido, Ichihara-shi, Chiba 290-0171, Japan |
| 290-0170 | Uruidominami うるいど南 Uruidominami, Ichihara-shi, Chiba 290-0170, Japan |
| 290-0508 | Egoda 江子田 Egoda, Ichihara-shi, Chiba 290-0508, Japan |
| 290-0211 | Ooke 大桶 Ooke, Ichihara-shi, Chiba 290-0211, Japan |
| 290-0532 | Okubo 大久保 Okubo, Ichihara-shi, Chiba 290-0532, Japan |
| 290-0234 | Okura 大蔵 Okura, Ichihara-shi, Chiba 290-0234, Japan |
| 290-0172 | Osaku 大作 Osaku, Ichihara-shi, Chiba 290-0172, Japan |
| 290-0208 | Otsubo 大坪 Otsubo, Ichihara-shi, Chiba 290-0208, Japan |
| 290-0542 | Oto 大戸 Oto, Ichihara-shi, Chiba 290-0542, Japan |
| 290-0002 | Omaya 大厩 Omaya, Ichihara-shi, Chiba 290-0002, Japan |
| 290-0553 | Owada 大和田 Owada, Ichihara-shi, Chiba 290-0553, Japan |
| 290-0177 | Ogisaku 荻作 Ogisaku, Ichihara-shi, Chiba 290-0177, Japan |
| 290-0513 | Okuno 奥野 Okuno, Ichihara-shi, Chiba 290-0513, Japan |
| 290-0157 | Oshinuma 押沼 Oshinuma, Ichihara-shi, Chiba 290-0157, Japan |
| 290-0176 | Odatsupe 小田部 Odatsupe, Ichihara-shi, Chiba 290-0176, Japan |
| 290-0533 | Orizu 折津 Orizu, Ichihara-shi, Chiba 290-0533, Japan |
| 290-0266 | Kaiho 海保 Kaiho, Ichihara-shi, Chiba 290-0266, Japan |
| 290-0548 | Kakinokidai 柿木台 Kakinokidai, Ichihara-shi, Chiba 290-0548, Japan |
| 290-0241 | Kazato 風戸 Kazato, Ichihara-shi, Chiba 290-0241, Japan |
| 299-0105 | Kashiwabara 柏原 Kashiwabara, Ichihara-shi, Chiba 299-0105, Japan |
| 290-0258 | Kajiro 神代 Kajiro, Ichihara-shi, Chiba 290-0258, Japan |
| 299-0113 | Katamatagi 片又木 Katamatagi, Ichihara-shi, Chiba 299-0113, Japan |
| 290-0174 | Katsuma 勝間 Katsuma, Ichihara-shi, Chiba 290-0174, Japan |
| 290-0233 | Kanesawa 金沢 Kanesawa, Ichihara-shi, Chiba 290-0233, Japan |
| 290-0243 | Kamitakane 上高根 Kamitakane, Ichihara-shi, Chiba 290-0243, Japan |
| 290-0025 | Kamo 加茂 Kamo, Ichihara-shi, Chiba 290-0025, Japan |
| 290-0235 | Kayahashi 栢橋 Kayahashi, Ichihara-shi, Chiba 290-0235, Japan |
| 290-0213 | Kawazai 川在 Kawazai, Ichihara-shi, Chiba 290-0213, Japan |
| 290-0178 | Kanzaki 神崎 Kanzaki, Ichihara-shi, Chiba 290-0178, Japan |
| 290-0007 | Kikuma 菊間 Kikuma, Ichihara-shi, Chiba 290-0007, Japan |
| 290-0167 | Kita 喜多 Kita, Ichihara-shi, Chiba 290-0167, Japan |
| 290-0071 | Kitakokubunjidai 北国分寺台 Kitakokubunjidai, Ichihara-shi, Chiba 290-0071, Japan |
| 290-0523 | Kichisawa 吉沢 Kichisawa, Ichihara-shi, Chiba 290-0523, Japan |
| 290-0051 | Kimizuka 君塚 Kimizuka, Ichihara-shi, Chiba 290-0051, Japan |
| 290-0179 | Kugutsu 久々津 Kugutsu, Ichihara-shi, Chiba 290-0179, Japan |
| 290-0156 | Kusakari 草刈 １６５６〜１９９９ Kusakari, Ichihara-shi, Chiba 290-0156, Japan |
| 290-0001 | Kusakari 草刈 その他 Kusakari, Ichihara-shi, Chiba 290-0001, Japan |
| 290-0552 | Kubo 久保 Kubo, Ichihara-shi, Chiba 290-0552, Japan |
| 290-0056 | Goi 五井 Goi, Ichihara-shi, Chiba 290-0056, Japan |
| 290-0057 | Goi Kanasugi 五井金杉 Goi Kanasugi, Ichihara-shi, Chiba 290-0057, Japan |
| 290-0081 | Goi Chuonishi 五井中央西 Goi Chuonishi, Ichihara-shi, Chiba 290-0081, Japan |
| 290-0054 | Goi Chuohigashi 五井中央東 Goi Chuohigashi, Ichihara-shi, Chiba 290-0054, Japan |
| 290-0082 | Goi Chuominami 五井中央南 Goi Chuominami, Ichihara-shi, Chiba 290-0082, Japan |
| 290-0038 | Goi Nishi 五井西 Goi Nishi, Ichihara-shi, Chiba 290-0038, Japan |
| 290-0055 | Goi Higashi 五井東 Goi Higashi, Ichihara-shi, Chiba 290-0055, Japan |
| 290-0058 | Goi Kaigan 五井海岸 Goi Kaigan, Ichihara-shi, Chiba 290-0058, Japan |
| 290-0045 | Goi Minamikaigan 五井南海岸 Goi Minamikaigan, Ichihara-shi, Chiba 290-0045, Japan |
| 290-0254 | Kozaka 高坂 Kozaka, Ichihara-shi, Chiba 290-0254, Japan |
| 290-0255 | Kofudai 光風台 Kofudai, Ichihara-shi, Chiba 290-0255, Japan |
| 290-0269 | Kori 小折 Kori, Ichihara-shi, Chiba 290-0269, Japan |
| 290-0013 | Korimoto 郡本 Korimoto, Ichihara-shi, Chiba 290-0013, Japan |
| 290-0526 | Kokusabata 小草畑 Kokusabata, Ichihara-shi, Chiba 290-0526, Japan |
| 290-0073 | Kokubunjidaichuo 国分寺台中央 Kokubunjidaichuo, Ichihara-shi, Chiba 290-0073, Japan |
| 290-0531 | Kokumoto 国本 Kokumoto, Ichihara-shi, Chiba 290-0531, Japan |
| 290-0528 | Koshikiya 古敷谷 Koshikiya, Ichihara-shi, Chiba 290-0528, Japan |
| 290-0066 | Gosho 五所 Gosho, Ichihara-shi, Chiba 290-0066, Japan |
| 290-0165 | Kotsube 古都辺 Kotsube, Ichihara-shi, Chiba 290-0165, Japan |
| 290-0559 | Komagome 駒込 Komagome, Ichihara-shi, Chiba 290-0559, Japan |
| 290-0529 | Koyata 小谷田 Koyata, Ichihara-shi, Chiba 290-0529, Japan |
| 290-0209 | Gongendo 権現堂 Gongendo, Ichihara-shi, Chiba 290-0209, Japan |
| 290-0162 | Kongoji 金剛地 Kongoji, Ichihara-shi, Chiba 290-0162, Japan |
| 290-0022 | Saihiro 西広 Saihiro, Ichihara-shi, Chiba 290-0022, Japan |
| 299-0127 | Sakuradai 桜台 Sakuradai, Ichihara-shi, Chiba 299-0127, Japan |
| 290-0229 | Saze 佐是 Saze, Ichihara-shi, Chiba 290-0229, Japan |
| 290-0050 | Sarashina 更級 Sarashina, Ichihara-shi, Chiba 290-0050, Japan |
| 299-0118 | Shiizu 椎津 Shiizu, Ichihara-shi, Chiba 299-0118, Japan |
| 299-0128 | Shiinokidai 椎の木台 Shiinokidai, Ichihara-shi, Chiba 299-0128, Japan |
| 290-0506 | Shimada 島田 Shimada, Ichihara-shi, Chiba 290-0506, Japan |
| 290-0034 | Shimano 島野 Shimano, Ichihara-shi, Chiba 290-0034, Japan |
| 290-0154 | Shimono 下野 Shimono, Ichihara-shi, Chiba 290-0154, Japan |
| 290-0518 | Shimoyata 下矢田 Shimoyata, Ichihara-shi, Chiba 290-0518, Japan |
| 290-0263 | Jugozawa 十五沢 Jugozawa, Ichihara-shi, Chiba 290-0263, Japan |
| 290-0503 | Shuku 宿 Shuku, Ichihara-shi, Chiba 290-0503, Japan |
| 299-0104 | Shiratsuka 白塚 Shiratsuka, Ichihara-shi, Chiba 299-0104, Japan |
| 290-0059 | Shiroganecho 白金町 Shiroganecho, Ichihara-shi, Chiba 290-0059, Japan |
| 290-0502 | Shingaya 真ケ谷 Shingaya, Ichihara-shi, Chiba 290-0502, Japan |
| 290-0539 | Sugeno 菅野 Sugeno, Ichihara-shi, Chiba 290-0539, Japan |
| 290-0026 | Suwa 諏訪 Suwa, Ichihara-shi, Chiba 290-0026, Japan |
| 290-0151 | Semata 瀬又 Semata, Ichihara-shi, Chiba 290-0151, Japan |
| 290-0023 | Soja 惣社 Soja, Ichihara-shi, Chiba 290-0023, Japan |
| 290-0161 | Takakura 高倉 Takakura, Ichihara-shi, Chiba 290-0161, Japan |
| 290-0555 | Takataki 高滝 Takataki, Ichihara-shi, Chiba 290-0555, Japan |
| 290-0152 | Takada 高田 Takada, Ichihara-shi, Chiba 290-0152, Japan |
| 290-0173 | Takiguchi 滝口 Takiguchi, Ichihara-shi, Chiba 290-0173, Japan |
| 290-0203 | Takeshi 武士 Takeshi, Ichihara-shi, Chiba 290-0203, Japan |
| 290-0003 | Tatsumidai Higashi 辰巳台東 Tatsumidai Higashi, Ichihara-shi, Chiba 290-0003, Japan |
| 290-0004 | Tatsumidai Nishi 辰巳台西 Tatsumidai Nishi, Ichihara-shi, Chiba 290-0004, Japan |
| 299-0121 | Tateno 立野 Tateno, Ichihara-shi, Chiba 299-0121, Japan |
| 290-0515 | Tabi 田尾 Tabi, Ichihara-shi, Chiba 290-0515, Japan |
| 290-0546 | Tabuchi 田淵 Tabuchi, Ichihara-shi, Chiba 290-0546, Japan |
| 290-0545 | Tabuchikyuhitake 田淵旧日竹 Tabuchikyuhitake, Ichihara-shi, Chiba 290-0545, Japan |
| 290-0041 | Tamasaki 玉前 Tamasaki, Ichihara-shi, Chiba 290-0041, Japan |
| 290-0044 | Tamasaki Nishi 玉前西 Tamasaki Nishi, Ichihara-shi, Chiba 290-0044, Japan |
| 299-0109 | Chigusa 千種 Chigusa, Ichihara-shi, Chiba 299-0109, Japan |
| 299-0108 | Chigusakaigan 千種海岸 Chigusakaigan, Ichihara-shi, Chiba 299-0108, Japan |
| 290-0143 | Chiharadai Nishi ちはら台西 Chiharadai Nishi, Ichihara-shi, Chiba 290-0143, Japan |
| 290-0141 | Chiharadai Higashi ちはら台東 Chiharadai Higashi, Ichihara-shi, Chiba 290-0141, Japan |
| 290-0142 | Chiharadai Minami ちはら台南 Chiharadai Minami, Ichihara-shi, Chiba 290-0142, Japan |
| 290-0032 | Tsuiheiji 廿五里 Tsuiheiji, Ichihara-shi, Chiba 290-0032, Japan |
| 290-0547 | Tsukizaki 月崎 Tsukizaki, Ichihara-shi, Chiba 290-0547, Japan |
| 290-0527 | Tsukide 月出 Tsukide, Ichihara-shi, Chiba 290-0527, Japan |
| 290-0215 | Tsuchiu 土宇 Tsuchiu, Ichihara-shi, Chiba 290-0215, Japan |
| 290-0512 | Tsurumai 鶴舞 Tsurumai, Ichihara-shi, Chiba 290-0512, Japan |
| 290-0042 | Dezu 出津 Dezu, Ichihara-shi, Chiba 290-0042, Japan |
| 290-0043 | Dezunishi 出津西 Dezunishi, Ichihara-shi, Chiba 290-0043, Japan |
| 290-0236 | Terayatsu 寺谷 Terayatsu, Ichihara-shi, Chiba 290-0236, Japan |
| 290-0544 | Tokuji 徳氏 Tokuji, Ichihara-shi, Chiba 290-0544, Japan |
| 290-0536 | Tozura 戸面 Tozura, Ichihara-shi, Chiba 290-0536, Japan |
| 290-0551 | Tonobeta 外部田 Tonobeta, Ichihara-shi, Chiba 290-0551, Japan |
| 299-0122 | Toyonari 豊成 Toyonari, Ichihara-shi, Chiba 299-0122, Japan |
| 290-0226 | Naka 中 Naka, Ichihara-shi, Chiba 290-0226, Japan |
| 290-0242 | Nakatakane 中高根 Nakatakane, Ichihara-shi, Chiba 290-0242, Japan |
| 290-0153 | Nakano 中野 Nakano, Ichihara-shi, Chiba 290-0153, Japan |
| 290-0168 | Nagayoshi 永吉 Nagayoshi, Ichihara-shi, Chiba 290-0168, Japan |
| 290-0164 | Nara 奈良 Nara, Ichihara-shi, Chiba 290-0164, Japan |
| 290-0206 | Niihori 新堀 Niihori, Ichihara-shi, Chiba 290-0206, Japan |
| 290-0231 | Nishikuniyoshi 西国吉 Nishikuniyoshi, Ichihara-shi, Chiba 290-0231, Japan |
| 290-0072 | Nishikokubunjidai 西国分寺台 Nishikokubunjidai, Ichihara-shi, Chiba 290-0072, Japan |
| 290-0065 | Nishigosho 西五所 Nishigosho, Ichihara-shi, Chiba 290-0065, Japan |
| 290-0261 | Nishino 西野 Nishino, Ichihara-shi, Chiba 290-0261, Japan |
| 290-0014 | Nishinoya 西野谷 Nishinoya, Ichihara-shi, Chiba 290-0014, Japan |
| 290-0024 | Neda 根田 Neda, Ichihara-shi, Chiba 290-0024, Japan |
| 290-0011 | Noman 能満 Noman, Ichihara-shi, Chiba 290-0011, Japan |
| 290-0033 | Noge 野毛 Noge, Ichihara-shi, Chiba 290-0033, Japan |
| 290-0175 | Hagi 葉木 Hagi, Ichihara-shi, Chiba 290-0175, Japan |
| 299-0112 | Hataki 畑木 Hataki, Ichihara-shi, Chiba 299-0112, Japan |
| 290-0507 | Harada 原田 Harada, Ichihara-shi, Chiba 290-0507, Japan |
| 290-0155 | Bamba 番場 Bamba, Ichihara-shi, Chiba 290-0155, Japan |
| 290-0163 | Higashikuniyoshi 東国吉 Higashikuniyoshi, Ichihara-shi, Chiba 290-0163, Japan |
| 290-0074 | Higashikokubunjidai 東国分寺台 Higashikokubunjidai, Ichihara-shi, Chiba 290-0074, Japan |
| 290-0064 | Higashigosho 東五所 Higashigosho, Ichihara-shi, Chiba 290-0064, Japan |
| 290-0256 | Hikida 引田 Hikida, Ichihara-shi, Chiba 290-0256, Japan |
| 290-0214 | Hitsuba 櫃挾 Hitsuba, Ichihara-shi, Chiba 290-0214, Japan |
| 290-0053 | Hirata 平田 Hirata, Ichihara-shi, Chiba 290-0053, Japan |
| 290-0541 | Hirano 平野 Hirano, Ichihara-shi, Chiba 290-0541, Japan |
| 299-0123 | Fukashiro 深城 Fukashiro, Ichihara-shi, Chiba 299-0123, Japan |
| 290-0202 | Fukumasu 福増 Fukumasu, Ichihara-shi, Chiba 290-0202, Japan |
| 290-0012 | Fujii 藤井 Fujii, Ichihara-shi, Chiba 290-0012, Japan |
| 290-0216 | Futsukaichiba 二日市場 Futsukaichiba, Ichihara-shi, Chiba 290-0216, Japan |
| 290-0554 | Funyu 不入 Funyu, Ichihara-shi, Chiba 290-0554, Japan |
| 290-0008 | Furuichiba 古市場 Furuichiba, Ichihara-shi, Chiba 290-0008, Japan |
| 290-0524 | Heizo 平蔵 Heizo, Ichihara-shi, Chiba 290-0524, Japan |
| 290-0224 | Home 奉免 Home, Ichihara-shi, Chiba 290-0224, Japan |
| 290-0504 | Horikoshi 堀越 Horikoshi, Ichihara-shi, Chiba 290-0504, Japan |
| 290-0556 | Hongo 本郷 Hongo, Ichihara-shi, Chiba 290-0556, Japan |
| 290-0267 | Machida 町田 Machida, Ichihara-shi, Chiba 290-0267, Japan |
| 290-0035 | Matsugashima 松ケ島 Matsugashima, Ichihara-shi, Chiba 290-0035, Japan |
| 290-0036 | Matsugashima Nishi 松ケ島西 Matsugashima Nishi, Ichihara-shi, Chiba 290-0036, Japan |
| 290-0217 | Matsuzaki 松崎 Matsuzaki, Ichihara-shi, Chiba 290-0217, Japan |
| 290-0549 | Mandano 万田野 Mandano, Ichihara-shi, Chiba 290-0549, Japan |
| 290-0514 | Mizusawa 水沢 Mizusawa, Ichihara-shi, Chiba 290-0514, Japan |
| 290-0244 | Minamiiwasaki 南岩崎 Minamiiwasaki, Ichihara-shi, Chiba 290-0244, Japan |
| 290-0075 | Minamikokubunjidai 南国分寺台 Minamikokubunjidai, Ichihara-shi, Chiba 290-0075, Japan |
| 290-0232 | Minayoshi 皆吉 Minayoshi, Ichihara-shi, Chiba 290-0232, Japan |
| 290-0264 | Miyabara 宮原 Miyabara, Ichihara-shi, Chiba 290-0264, Japan |
| 290-0223 | Myoko 妙香 Myoko, Ichihara-shi, Chiba 290-0223, Japan |
| 299-0116 | Mukaeda 迎田 Mukaeda, Ichihara-shi, Chiba 299-0116, Japan |
| 290-0031 | Murakami 村上 Murakami, Ichihara-shi, Chiba 290-0031, Japan |
| 290-0016 | Monzen 門前 Monzen, Ichihara-shi, Chiba 290-0016, Japan |
| 290-0517 | Yata 矢田 Yata, Ichihara-shi, Chiba 290-0517, Japan |
| 290-0538 | Yanagawa 柳川 Yanagawa, Ichihara-shi, Chiba 290-0538, Japan |
| 290-0268 | Yanagihara 柳原 Yanagihara, Ichihara-shi, Chiba 290-0268, Japan |
| 290-0227 | Yabu 藪 Yabu, Ichihara-shi, Chiba 290-0227, Japan |
| 290-0005 | Yamaki 山木 Yamaki, Ichihara-shi, Chiba 290-0005, Japan |
| 290-0201 | Yamakura 山倉 Yamakura, Ichihara-shi, Chiba 290-0201, Japan |
| 290-0558 | Yamaguchi 山口 Yamaguchi, Ichihara-shi, Chiba 290-0558, Japan |
| 290-0521 | Yamakogawa 山小川 Yamakogawa, Ichihara-shi, Chiba 290-0521, Japan |
| 290-0205 | Yamada 山田 Yamada, Ichihara-shi, Chiba 290-0205, Japan |
| 290-0021 | Yamadabashi 山田橋 Yamadabashi, Ichihara-shi, Chiba 290-0021, Japan |
| 290-0062 | Yawata 八幡 Yawata, Ichihara-shi, Chiba 290-0062, Japan |
| 290-0061 | Yawata Ishizuka 八幡石塚 Yawata Ishizuka, Ichihara-shi, Chiba 290-0061, Japan |
| 290-0067 | Yawata Kaigandori 八幡海岸通 Yawata Kaigandori, Ichihara-shi, Chiba 290-0067, Japan |
| 290-0069 | Yawata Kitacho 八幡北町 Yawata Kitacho, Ichihara-shi, Chiba 290-0069, Japan |
| 290-0068 | Yawataura 八幡浦 Yawataura, Ichihara-shi, Chiba 290-0068, Japan |
| 299-0124 | Yushudai Higashi 有秋台東 Yushudai Higashi, Ichihara-shi, Chiba 299-0124, Japan |
| 299-0125 | Yushudai Nishi 有秋台西 Yushudai Nishi, Ichihara-shi, Chiba 299-0125, Japan |
| 290-0557 | Yoro 養老 Yoro, Ichihara-shi, Chiba 290-0557, Japan |
| 290-0501 | Yonezawa 米沢 Yonezawa, Ichihara-shi, Chiba 290-0501, Japan |
| 290-0525 | Yonewara 米原 Yonewara, Ichihara-shi, Chiba 290-0525, Japan |
| 290-0006 | Wakamiya 若宮 Wakamiya, Ichihara-shi, Chiba 290-0006, Japan |
| 290-0259 | Wamme 分目 Wamme, Ichihara-shi, Chiba 290-0259, Japan |
Source: Japan Post postal code data (UTF-8 edition, updated Aug 31, 2026) and romanized edition (KEN_ALL_ROME, June 2025). Japan Post does not claim copyright on postal code data and allows free redistribution. Romaji follows Japan Post (long vowels are not marked). * = romanized by this site from the kana reading because the town is not yet in the romanized edition.