Japan Company Registry Search (Official NTA Data)

Search Japan's official registry of corporations (millions of records; Tokyo alone has 1.37 million) by company name, 13-digit corporate number (法人番号), address or postcode. The data is the National Tax Agency (NTA) corporate number open data, the official list of every corporation that has been assigned a corporate number.

• Search in Japanese, kana, English or romaji. For example, ソニー or Sony Interactive both find 株式会社ソニー・インタラクティブエンタテインメント.
• Verify a Japanese company (KYB / vendor onboarding): check that the legal name, the registered address and the status (active or closed) match.
• Build lead lists by area: every KK or GK registered in a ward or postcode area (e.g. 渋谷区, postcode 150).
• English-friendly output: company type in English, prefecture in English, the official English name when one is registered, and an automatic romaji reading.
• Official open data, no login, no proxy, no API key.

How it works

The NTA publishes the complete registry as one file per prefecture, updated monthly. For each prefecture you select, the Actor downloads the official file and streams through every corporation to apply your filters. Tokyo (1.37 million records, including 1.17 million active corporations) took about 13 seconds in our tests. Most prefectures take 1 to 3 seconds.

Input example

{
  "prefectures": ["Tokyo"],
  "nameKeywords": ["ソニー", "Sony Interactive"],
  "companyTypes": ["kabushiki"],
  "includeClosed": false,
  "maxItems": 50
}

Look up specific corporate numbers:

{ "prefectures": ["Tokyo"], "corporateNumbers": ["3010401087161", "1010001126313"] }

All filters combine with AND. Name keywords match if any keyword matches.

Output example (real record)

{
  "corporateNumber": "3010401087161",
  "name": "株式会社ソニー・インタラクティブエンタテインメント",
  "nameKana": "ソニーインタラクティブエンタテインメント",
  "nameEnglish": "Sony Interactive Entertainment Inc.",
  "nameRomaji": "Soniiintarakutibuentateinmento",
  "companyType": "Kabushiki Kaisha (stock company, KK)",
  "companyTypeJa": "株式会社",
  "prefecture": "東京都",
  "prefectureEn": "Tokyo",
  "city": "港区",
  "fullAddress": "東京都港区港南１丁目７番１号",
  "postCode": "108-0075",
  "corporateNumberAssignedDate": "2015-10-05",
  "changeDate": "2016-04-05",
  "lastChangeType": "Name change",
  "closeDate": null,
  "ntaUrl": "https://www.houjin-bangou.nta.go.jp/henkorireki-johoto.html?selHouzinNo=3010401087161"
}

Other fields: kindCode, cityCode, cityEn, streetAddress, addressOverseas, closeCause, successorCorporateNumber, updateDate, isLatest, source. RUN_SUMMARY in the key-value store lists the rows scanned for each prefecture and any corporate numbers that were not found.

Use cases

• KYB / vendor verification for Japanese counterparties: confirm the legal name, the address and whether the company is active.
• CRM enrichment: add the official corporate number and the normalized address to your Japanese accounts.
• Territory lead lists: all companies in a city, ward or postcode area, filtered by company type.
• Entity resolution: match English or romaji company names to the official Japanese legal entity.

Pricing

Pay per event: a small fee for each prefecture file scanned, plus a fee for each company returned. See the Pricing tab. Choose only the prefectures you need.

Data source, license and limitations

• Source: National Tax Agency Corporate Number Publication Site, full data files (Unicode CSV), updated monthly. The terms are compatible with the Public Data License 1.0 (similar to CC BY 4.0), so commercial reuse is allowed with attribution. Every record includes a source field. This Actor is not affiliated with or guaranteed by the NTA.
• The monthly files can be a few weeks old. For companies registered in the last days, use our Japan New Company Registrations Feed.
• The registry has no phone numbers, emails, officers, capital or revenue.
• A corporate number lookup searches only the prefectures you select. If you don't know the prefecture, add the likely ones (Tokyo, Osaka, Kanagawa, Aichi...).
• Records the NTA marks as excluded from search are always skipped. Sole proprietors are not included.
• nameRomaji is generated automatically from the official kana and is approximate.

FAQ

Why do I have to choose prefectures? Each prefecture is a separate official file. Scanning only what you need keeps runs fast and cheap.

Can I search by English name? Partly. Few companies register an official English name: 3,610 of the 1.17 million active Tokyo corporations (0.3%, measured in September 2026), mostly large companies. About 63% have an official kana reading, and keywords with 4 or more letters are also matched against the romaji generated from it (e.g. sumitomo). For the most reliable results, search in Japanese.

Is this legal? Yes. This is official government open data published for reuse. The Actor downloads the published files and includes the attribution the terms require.

Changelog

• 0.1 (2026-09): First release.