郵便番号簿 - キーワード／オフライン／索引検索

This is a postal code search app that supports postal code information as of August 31, 2023 (Reiwa 5).
Keyword search allows you to search in real time from part of the address or postal code.
In the index search, you can search by prefecture name or city, ward, town, or village name.
All searches are available offline and results can be bookmarked.
It can be used when addressing letters, parcels, and New Year's cards.

Major features

Keyword search
You can search for postal codes by specifying the address (pronounced kana is OK) as a keyword.
By inserting a space, you can perform an AND search using multiple keywords.
You can also search for addresses by postal code.

Search results can be viewed on the details screen and you can copy the postal code and address.
You can also save it to your bookmarks and easily view the postal code next time.

index search
You can search for postal codes in the order of "Prefecture" → "City" → "Town area" → "Details".

bookmark
You can display postal codes that you have bookmarked.


About postal code data
This app uses processed postal code data published by Japan Post Co., Ltd. below.

Postal code data download
　http://www.post.japanpost.jp/zipcode/download.html