Postal codes in Oi-machi, Ashigarakami-gun, Kanagawa
神奈川県足柄上郡開成町 — 10 postal codes. General code: 258-0000. Local government code 14366.
Address example
1-2-3 Ushijima, Oi-machi, Ashigarakami-gun, Kanagawa 258-0022, Japan
〒258-0022 神奈川県足柄上郡開成町牛島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 |
|---|---|
| 258-0000 | (any other address in this municipality) （下に掲載がない場合） Oi-machi, Ashigarakami-gun, Kanagawa 258-0000, Japan |
| 258-0022 | Ushijima 牛島 Ushijima, Oi-machi, Ashigarakami-gun, Kanagawa 258-0022, Japan |
| 258-0025 | Entsuji 円通寺 Entsuji, Oi-machi, Ashigarakami-gun, Kanagawa 258-0025, Japan |
| 258-0027 | Okano 岡野 Okano, Oi-machi, Ashigarakami-gun, Kanagawa 258-0027, Japan |
| 258-0028 | Kanaishima 金井島 Kanaishima, Oi-machi, Ashigarakami-gun, Kanagawa 258-0028, Japan |
| 258-0024 | Nakanomyo 中之名 Nakanomyo, Oi-machi, Ashigarakami-gun, Kanagawa 258-0024, Japan |
| 258-0026 | Nobusawa 延沢 Nobusawa, Oi-machi, Ashigarakami-gun, Kanagawa 258-0026, Japan |
| 258-0029 | Minami みなみ Minami, Oi-machi, Ashigarakami-gun, Kanagawa 258-0029, Japan |
| 258-0023 | Miyanodai 宮台 Miyanodai, Oi-machi, Ashigarakami-gun, Kanagawa 258-0023, Japan |
| 258-0021 | Yoshidajima 吉田島 Yoshidajima, Oi-machi, Ashigarakami-gun, Kanagawa 258-0021, 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.