JP Japan Major Regions Postal Code Details
🏛️ Ibaraki · Kanto
300-1157
Ami-machi
306-0631
Bando-shi
300-4505
Chikusei-shi
319-3536
Daigo-machi
306-0300
Goka-machi
317-0053
Hitachi-shi
311-1255
Hitachinaka-shi
319-2227
Hitachiomiya-shi
313-0021
Hitachiota-shi
311-1414
Hokota-shi
311-3104
Ibaraki-machi
301-0901
Inashiki-shi
315-0148
Ishioka-shi
311-2431
Itako-shi
300-2505
Joso-shi
314-0143
Kamisu-shi
309-1712
Kasama-shi
314-0015
Kashima-shi
300-0214
Kasumigaura-shi
300-1403
Kawachi-machi
319-1500
Kitaibaraki-shi
306-0044
Koga-shi
300-0406
Miho-mura
310-0911
Mito-shi
302-0116
Moriya-shi
311-0104
Naka-shi
311-3518
Namegata-shi
311-1311
Oarai-machi
311-3417
Omitama-shi
301-0856
Ryugasaki-shi
306-0402
Sakai-machi
309-1243
Sakuragawa-shi
304-0053
Shimotsuma-shi
311-4311
Shirosato-machi
318-0034
Takahagi-shi
319-1102
Tokai-mura
300-1621
Tone-machi
302-0012
Toride-shi
300-0038
Tsuchiura-shi
300-1274
Tsukuba-shi
300-2355
Tsukubamirai-shi
300-1222
Ushiku-shi
300-3538
Yachiyo-machi
307-0003
Yuki-shi
📮JP Japan Regional Postal Code FAQ & Postal Regulations
🔢 How many digits are in a Japanese postal code?
Japanese postal codes consist of 7 digits in XXX-XXXX format (e.g., 100-8994).
🌍 Are extra markings needed for international mail?
Yes, for mail to Japan, add 'JAPAN' in English on the last address line, while keeping the 7-digit postal code.
❓ How to find an unknown postal code?
Use Japan Post's official postal code search (jp.postcode.com) or Google "住所 郵便番号" + address keywords.
📮 Will a wrong postal code delay delivery?
If the full address is correct, delivery may succeed but will be significantly delayed. Verify codes via Japan Post's address correction system.
🔄 Do postal codes ever change?
Yes, codes may update due to administrative changes. Always refer to the latest annual "Postal Code Directory" by Japan Post.