Postal codes in Yamaguchi Prefecture, Japan
Yamaguchi (山口県) has 19 municipalities in Japan Post's data. Choose a city, ward, town or village to see every postal code with the English address.
- Shimonoseki-shi 下関市
- Ube-shi 宇部市
- Yamaguchi-shi 山口市
- Hagi-shi 萩市
- Hofu-shi 防府市
- Kudamatsu-shi 下松市
- Iwakuni-shi 岩国市
- Hikari-shi 光市
- Nagato-shi 長門市
- Yanai-shi 柳井市
- Mine-shi 美祢市
- Shunan-shi 周南市
- Sanyoonoda-shi 山陽小野田市
- Suooshima-cho, Oshima-gun 大島郡周防大島町
- Iwakuni-shi 玖珂郡和木町
- Kaminoseki-cho, Kumage-gun 熊毛郡上関町
- Tabuse-cho, Kumage-gun 熊毛郡田布施町
- Hirao-cho, Kumage-gun 熊毛郡平生町
- Abu-cho, Abu-gun 阿武郡阿武町
Search all of Japan on the postal code lookup. Municipalities are listed in the order of Japan's local government codes; designated cities are split into wards (-ku).
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.