Postal codes in Isumi-shi, Chiba
千葉県いすみ市 — 67 postal codes. General code: 298-0000. Local government code 12238.
Address example
1-2-3 Imazeki, Isumi-shi, Chiba 298-0126, Japan
〒298-0126 千葉県いすみ市今関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 |
|---|---|
| 298-0000 | (any other address in this municipality) （下に掲載がない場合） Isumi-shi, Chiba 298-0000, Japan |
| 298-0126 | Imazeki 今関 Imazeki, Isumi-shi, Chiba 298-0126, Japan |
| 298-0011 | Iwafune 岩船 Iwafune, Isumi-shi, Chiba 298-0011, Japan |
| 298-0013 | Oike 小池 Oike, Isumi-shi, Chiba 298-0013, Japan |
| 298-0113 | Ono 大野 Ono, Isumi-shi, Chiba 298-0113, Japan |
| 298-0004 | Ohara 大原 Ohara, Isumi-shi, Chiba 298-0004, Japan |
| 298-0014 | Oharadai 大原台 Oharadai, Isumi-shi, Chiba 298-0014, Japan |
| 298-0006 | Oharamogamidai 大原最上台 Oharamogamidai, Isumi-shi, Chiba 298-0006, Japan |
| 298-0029 | Owada 大和田 Owada, Isumi-shi, Chiba 298-0029, Japan |
| 298-0131 | Ogiwara 荻原 Ogiwara, Isumi-shi, Chiba 298-0131, Japan |
| 298-0012 | Ozawa 小沢 Ozawa, Isumi-shi, Chiba 298-0012, Japan |
| 298-0102 | Odaka 小高 Odaka, Isumi-shi, Chiba 298-0102, Japan |
| 298-0115 | Kakiwada 柿和田 Kakiwada, Isumi-shi, Chiba 298-0115, Japan |
| 298-0103 | Kamioki 神置 Kamioki, Isumi-shi, Chiba 298-0103, Japan |
| 298-0018 | Kamibuse 上布施 Kamibuse, Isumi-shi, Chiba 298-0018, Japan |
| 298-0123 | Kariya 苅谷 Kariya, Isumi-shi, Chiba 298-0123, Japan |
| 298-0112 | Konodai 国府台 Konodai, Isumi-shi, Chiba 298-0112, Japan |
| 298-0101 | Komatai 小又井 Komatai, Isumi-shi, Chiba 298-0101, Japan |
| 298-0135 | Sakuda 作田 Sakuda, Isumi-shi, Chiba 298-0135, Japan |
| 298-0114 | Satsumori 札森 Satsumori, Isumi-shi, Chiba 298-0114, Japan |
| 298-0022 | Samuro 佐室 Samuro, Isumi-shi, Chiba 298-0022, Japan |
| 298-0023 | Sawabe 沢部 Sawabe, Isumi-shi, Chiba 298-0023, Japan |
| 298-0121 | Shima 島 Shima, Isumi-shi, Chiba 298-0121, Japan |
| 298-0027 | Shimohara 下原 Shimohara, Isumi-shi, Chiba 298-0027, Japan |
| 298-0017 | Shimobuse 下布施 Shimobuse, Isumi-shi, Chiba 298-0017, Japan |
| 298-0015 | Shakayatsu 釈迦谷 Shakayatsu, Isumi-shi, Chiba 298-0015, Japan |
| 298-0116 | Shoryuji 正立寺 Shoryuji, Isumi-shi, Chiba 298-0116, Japan |
| 298-0106 | Sugaya 須賀谷 Sugaya, Isumi-shi, Chiba 298-0106, Japan |
| 298-0021 | Takadani 高谷 Takadani, Isumi-shi, Chiba 298-0021, Japan |
| 298-0024 | Nagashi 長志 Nagashi, Isumi-shi, Chiba 298-0024, Japan |
| 298-0134 | Namegawa 行川 Namegawa, Isumi-shi, Chiba 298-0134, Japan |
| 298-0005 | Nitta 新田 Nitta, Isumi-shi, Chiba 298-0005, Japan |
| 298-0026 | Nittano 新田野 Nittano, Isumi-shi, Chiba 298-0026, Japan |
| 298-0016 | Nittawakayamafukahoriiriaichi 新田若山深堀入会地 Nittawakayamafukahoriiriaichi, Isumi-shi, Chiba 298-0016, Japan |
| 298-0105 | Nojitsu 能実 Nojitsu, Isumi-shi, Chiba 298-0105, Japan |
| 298-0002 | Hiari 日在 Hiari, Isumi-shi, Chiba 298-0002, Japan |
| 298-0133 | Hikida 引田 Hikida, Isumi-shi, Chiba 298-0133, Japan |
| 298-0003 | Fukahori 深堀 Fukahori, Isumi-shi, Chiba 298-0003, Japan |
| 298-0125 | Fukaya 深谷 Fukaya, Isumi-shi, Chiba 298-0125, Japan |
| 298-0028 | Hoso 細尾 Hoso, Isumi-shi, Chiba 298-0028, Japan |
| 298-0117 | Masuda 増田 Masuda, Isumi-shi, Chiba 298-0117, Japan |
| 298-0104 | Matsumaru 松丸 Matsumaru, Isumi-shi, Chiba 298-0104, Japan |
| 298-0111 | Mangi 万木 Mangi, Isumi-shi, Chiba 298-0111, Japan |
| 299-4615 | Misakicho Izawa 岬町井沢 Misakicho Izawa, Isumi-shi, Chiba 299-4615, Japan |
| 299-4611 | Misakicho Izumi 岬町和泉 ４４００番以上 Misakicho Izumi, Isumi-shi, Chiba 299-4611, Japan |
| 299-4503 | Misakicho Izumi 岬町和泉 その他 Misakicho Izumi, Isumi-shi, Chiba 299-4503, Japan |
| 299-4506 | Misakicho Ichinono 岬町市野々 Misakicho Ichinono, Isumi-shi, Chiba 299-4506, Japan |
| 299-4505 | Misakicho Iwakuma 岬町岩熊 Misakicho Iwakuma, Isumi-shi, Chiba 299-4505, Japan |
| 299-4508 | Misakicho Enokisawa 岬町榎沢 Misakicho Enokisawa, Isumi-shi, Chiba 299-4508, Japan |
| 299-4612 | Misakicho Ebado 岬町江場土 Misakicho Ebado, Isumi-shi, Chiba 299-4612, Japan |
| 299-4622 | Misakicho Oshibi 岬町押日 Misakicho Oshibi, Isumi-shi, Chiba 299-4622, Japan |
| 299-4624 | Misakicho Kamone 岬町鴨根 Misakicho Kamone, Isumi-shi, Chiba 299-4624, Japan |
| 299-4625 | Misakicho Kaya 岬町嘉谷 Misakicho Kaya, Isumi-shi, Chiba 299-4625, Japan |
| 299-4504 | Misakicho Kuwada 岬町桑田 Misakicho Kuwada, Isumi-shi, Chiba 299-4504, Japan |
| 299-4501 | Misakicho Shiigi 岬町椎木 Misakicho Shiigi, Isumi-shi, Chiba 299-4501, Japan |
| 299-4616 | Misakicho Choja 岬町長者 Misakicho Choja, Isumi-shi, Chiba 299-4616, Japan |
| 299-4623 | Misakicho Nakadaki 岬町中滝 Misakicho Nakadaki, Isumi-shi, Chiba 299-4623, Japan |
| 299-4502 | Misakicho Nakahara 岬町中原 Misakicho Nakahara, Isumi-shi, Chiba 299-4502, Japan |
| 299-4614 | Misakicho Higashiodaka 岬町東小高 Misakicho Higashiodaka, Isumi-shi, Chiba 299-4614, Japan |
| 299-4621 | Misakicho Higashinakataki 岬町東中滝 Misakicho Higashinakataki, Isumi-shi, Chiba 299-4621, Japan |
| 299-4613 | Misakicho Mikado 岬町三門 Misakicho Mikado, Isumi-shi, Chiba 299-4613, Japan |
| 299-4507 | Misakicho Yagami 岬町谷上 Misakicho Yagami, Isumi-shi, Chiba 299-4507, Japan |
| 298-0132 | Yaotome 八乙女 Yaotome, Isumi-shi, Chiba 298-0132, Japan |
| 298-0124 | Yamasa 弥正 Yamasa, Isumi-shi, Chiba 298-0124, Japan |
| 298-0025 | Yamada 山田 Yamada, Isumi-shi, Chiba 298-0025, Japan |
| 298-0122 | Rakumachi 楽町 Rakumachi, Isumi-shi, Chiba 298-0122, Japan |
| 298-0001 | Wakayama 若山 Wakayama, Isumi-shi, Chiba 298-0001, 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.