Postal codes in Tomioka-shi, Gumma
群馬県富岡市 — 54 postal codes. General code: 370-2300. Local government code 10210.
Address example
1-2-3 Ainota, Tomioka-shi, Gumma 370-2306, Japan
〒370-2306 群馬県富岡市相野田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 |
|---|---|
| 370-2300 | (any other address in this municipality) （下に掲載がない場合） Tomioka-shi, Gumma 370-2300, Japan |
| 370-2306 | Ainota 相野田 Ainota, Tomioka-shi, Gumma 370-2306, Japan |
| 370-2452 | Ichinomiya 一ノ宮 Ichinomiya, Tomioka-shi, Gumma 370-2452, Japan |
| 370-2322 | Iwasome 岩染 Iwasome, Tomioka-shi, Gumma 370-2322, Japan |
| 370-2451 | Uda 宇田 Uda, Tomioka-shi, Gumma 370-2451, Japan |
| 370-2335 | Oshima 大島 Oshima, Tomioka-shi, Gumma 370-2335, Japan |
| 370-2321 | Okamoto 岡本 Okamoto, Tomioka-shi, Gumma 370-2321, Japan |
| 370-2466 | Kanuma 蚊沼 Kanuma, Tomioka-shi, Gumma 370-2466, Japan |
| 370-2455 | Kanohara 神農原 Kanohara, Tomioka-shi, Gumma 370-2455, Japan |
| 370-2345 | Kamikuroiwa 上黒岩 Kamikuroiwa, Tomioka-shi, Gumma 370-2345, Japan |
| 370-2456 | Kamikobayashi 上小林 Kamikobayashi, Tomioka-shi, Gumma 370-2456, Japan |
| 370-2317 | Kamitakao 上高尾 Kamitakao, Tomioka-shi, Gumma 370-2317, Japan |
| 370-2334 | Kamidakase 上高瀬 Kamidakase, Tomioka-shi, Gumma 370-2334, Japan |
| 370-2461 | Kaminyu 上丹生 Kaminyu, Tomioka-shi, Gumma 370-2461, Japan |
| 370-2463 | Kannari 神成 Kannari, Tomioka-shi, Gumma 370-2463, Japan |
| 370-2313 | Kimikawa 君川 Kimikawa, Tomioka-shi, Gumma 370-2313, Japan |
| 370-2344 | Kurokawa 黒川 Kurokawa, Tomioka-shi, Gumma 370-2344, Japan |
| 370-2301 | Kuwahara 桑原 Kuwahara, Tomioka-shi, Gumma 370-2301, Japan |
| 370-2304 | Goka 後賀 Goka, Tomioka-shi, Gumma 370-2304, Japan |
| 370-2302 | Kokuwahara 小桑原 Kokuwahara, Tomioka-shi, Gumma 370-2302, Japan |
| 370-2341 | Shimokuroiwa 下黒岩 Shimokuroiwa, Tomioka-shi, Gumma 370-2341, Japan |
| 370-2311 | Shimotakao 下高尾 Shimotakao, Tomioka-shi, Gumma 370-2311, Japan |
| 370-2332 | Shimodakase 下高瀬 Shimodakase, Tomioka-shi, Gumma 370-2332, Japan |
| 370-2462 | Shimonyu 下丹生 Shimonyu, Tomioka-shi, Gumma 370-2462, Japan |
| 370-2305 | Shiraiwa 白岩 Shiraiwa, Tomioka-shi, Gumma 370-2305, Japan |
| 370-2315 | Sogi 曽木 Sogi, Tomioka-shi, Gumma 370-2315, Japan |
| 370-2331 | Takumi 内匠 Takumi, Tomioka-shi, Gumma 370-2331, Japan |
| 370-2314 | Tajino 田篠 Tajino, Tomioka-shi, Gumma 370-2314, Japan |
| 370-2454 | Tajima 田島 Tajima, Tomioka-shi, Gumma 370-2454, Japan |
| 370-2316 | Tomioka 富岡 Tomioka, Tomioka-shi, Gumma 370-2316, Japan |
| 370-2465 | Nakazawa 中沢 Nakazawa, Tomioka-shi, Gumma 370-2465, Japan |
| 370-2333 | Nakadakase 中高瀬 Nakadakase, Tomioka-shi, Gumma 370-2333, Japan |
| 370-2343 | Nanokaichi 七日市 Nanokaichi, Tomioka-shi, Gumma 370-2343, Japan |
| 370-2464 | Nanjai 南蛇井 Nanjai, Tomioka-shi, Gumma 370-2464, Japan |
| 370-2323 | Nogami 野上 Nogami, Tomioka-shi, Gumma 370-2323, Japan |
| 370-2467 | Hara 原 Hara, Tomioka-shi, Gumma 370-2467, Japan |
| 370-2307 | Fujiki 藤木 Fujiki, Tomioka-shi, Gumma 370-2307, Japan |
| 370-2342 | Betsupo 別保 Betsupo, Tomioka-shi, Gumma 370-2342, Japan |
| 370-2312 | Hoshida 星田 Hoshida, Tomioka-shi, Gumma 370-2312, Japan |
| 370-2324 | Minamigoka 南後箇 Minamigoka, Tomioka-shi, Gumma 370-2324, Japan |
| 370-2453 | Miyazaki 宮崎 Miyazaki, Tomioka-shi, Gumma 370-2453, Japan |
| 379-0202 | Myogimachi Oushi 妙義町大牛 Myogimachi Oushi, Tomioka-shi, Gumma 379-0202, Japan |
| 370-2411 | Myogimachi Kamitakata 妙義町上高田 Myogimachi Kamitakata, Tomioka-shi, Gumma 370-2411, Japan |
| 379-0205 | Myogimachi Kitayama 妙義町北山 Myogimachi Kitayama, Tomioka-shi, Gumma 379-0205, Japan |
| 370-2412 | Myogimachi Shimotakata 妙義町下高田 Myogimachi Shimotakata, Tomioka-shi, Gumma 370-2412, Japan |
| 379-0208 | Myogimachi Sugahara 妙義町菅原 Myogimachi Sugahara, Tomioka-shi, Gumma 379-0208, Japan |
| 379-0203 | Myogimachi Take 妙義町岳 Myogimachi Take, Tomioka-shi, Gumma 379-0203, Japan |
| 379-0206 | Myogimachi Nakazato 妙義町中里 Myogimachi Nakazato, Tomioka-shi, Gumma 379-0206, Japan |
| 379-0204 | Myogimachi Namezawa 妙義町行沢 Myogimachi Namezawa, Tomioka-shi, Gumma 379-0204, Japan |
| 379-0207 | Myogimachi Furutachi 妙義町古立 Myogimachi Furutachi, Tomioka-shi, Gumma 379-0207, Japan |
| 379-0201 | Myogimachi Myogi 妙義町妙義 Myogimachi Myogi, Tomioka-shi, Gumma 379-0201, Japan |
| 379-0209 | Myogimachi Moroto 妙義町諸戸 Myogimachi Moroto, Tomioka-shi, Gumma 379-0209, Japan |
| 370-2413 | Myogimachi Yagitsure 妙義町八木連 Myogimachi Yagitsure, Tomioka-shi, Gumma 370-2413, Japan |
| 370-2303 | Warabi 蕨 Warabi, Tomioka-shi, Gumma 370-2303, 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.