Government (Japan)
Use Corporate Number Publication Site (Houjin Bangou) from your AI
Look up Japanese corporations in the National Tax Agency's Corporate Number System (houjin bangou) Web API. Search by company name or resolve a 13-digit corporate number to the registered name and address - the foundation for entity resolution across all other corporate data sources. Requires an application ID issued by the NTA.
This server connects your AI client to the Corporate Number System Web API (Version 4) operated by Japan's National Tax Agency. Every registered corporation in Japan has a unique 13-digit corporate number, and this API is the authoritative source for the mapping between numbers, registered names, and head-office addresses.
Key features:
- Search corporations by name (prefix or partial match), optionally narrowed by prefecture/municipality.
- Resolve up to 10 corporate numbers at once to their registered name, address, corporation kind, and change/closure history.
Because the corporate number is the common key used by gBizINFO, EDINET, procurement data, and most other Japanese business datasets, this API is the natural first step for entity resolution: find the right corporate number first, then join everything else onto it.
Using the API requires a free application ID (アプリケーションID) issued by the NTA; apply on the Web API page of the Corporate Number Publication Site. Set it as HOUJIN_BANGOU_APP_ID in your Arlet environment variables.
What you need
- An Arlet account
- An API key issued by Corporate Number Publication Site (Houjin Bangou) is required (most are free to obtain).
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