PASAR API

🇯🇵 zipcloud ~ Japan postal code to address lookup

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Free, no registration; it is a third party redistributing Japan Post's postal-code data (not an official Japan Post API), so treat availability as best-effort.

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Call it

curl 'https://zipcloud.ibsnet.co.jp/api/search'

AI prompt

I'm building an app using a free Japan API (no auth needed).

API: zipcloud ~ Japan postal code to address lookup
Provider: IBIS Inc. (zipcloud)
Endpoint: GET https://zipcloud.ibsnet.co.jp/api/search
It returns JSON.

Source: IBIS Inc. (zipcloud) (https://zipcloud.ibsnet.co.jp/doc/api)
Source type: Official open-data catalogue
Endpoint type: Open-data catalogue JSON
Integration difficulty: Copy-paste ready
Last checked: 2026-07-05
Production caveat: Still handle empty rows, schema changes, pagination, stale coverage, and temporary upstream failures.

Help me fetch this and build a simple page that displays it nicely. Include basic production safeguards for errors, empty responses, schema changes, caching, and rate limits.

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