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regbase-jp-registry-diff-sample

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corporate-registry
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metadata 
language:
  - ja
  - en
license: other
license_name: regbase-sample-license-note
task_categories:
  - tabular-question-answering
tags:
  - japan
  - corporate-registry
  - company-data
  - open-data
  - b2b
  - houjin-bangou
size_categories:
  - n<1K
pretty_name: RegBase — Japan Corporate Registry Daily Diff (Free Sample, 2026-11-06)

RegBase — Japan Corporate Registry Daily Diff · Free Sample (2026-11-06)

Japan's National Tax Agency (国税庁) publishes the national corporate registry as open data: every registered company's corporate number (法人番号), name, entity type and address. What it does not publish in a usable shape is what changed today. RegBase cuts the registry's daily diff — the registrations that were created, changed, or removed on a single day — into a clean, documented, verifiable package.

This dataset is the free sample of that work: the first 100 records of the 2026-11-06 registry diff, plus the full day's census summary.

What happened on 2026-11-06

The complete diff for the 2026-11-06 update contained 2,617 records:

Change class Count
New registrations 1,404
Changed registrations 895
Closed registrations 298
Revived registrations 20
Total 2,617

New registrations by prefecture (top 3): Tokyo 370, Osaka 128, Kanagawa 95. By municipality (top 3): Minato City, Tokyo 65; Chuo City, Tokyo 40; Chiyoda City, Tokyo 32. Cross-checked against a 3,808-company listed-company master, 6 of the day's records belonged to listed companies — all of them "changed". Full top-10 tables and the complete census are in data/.

Files

File Contents
data/sample_diff_20261106.csv First 100 records of the 2026-11-06 diff. UTF-8, no header row, 30 columns (schema below). Byte-identical to the first 100 records of the full product file.
data/census_summary.json Full census of the day's 2,617 records: counts by change class, process code, prefecture, entity type, and top municipalities for new registrations.
data/change_class_split.csv Record counts by change class (new / changed / closed / revival / other).
data/top_prefectures_new.csv Top 10 prefectures by new registrations.
data/top_municipalities_new.csv Top 10 municipalities by new registrations.

Schema (30 columns, in order)

  1. sequence_number — row sequence within the source publication
  2. corporate_number — 13-digit corporate number (法人番号); import as text to keep leading zeros
  3. process_code — registry process code
  4. correction_code — correction flag
  5. update_date — date the change was published
  6. change_date — date of the underlying change
  7. name — registered name (Japanese)
  8. name_image_id — name image reference
  9. entity_type — entity type code (e.g. 301 = stock company)
  10. prefecture — prefecture (Japanese)
  11. city — city / ward / town / village (Japanese)
  12. street_address — street address (Japanese)
  13. address_image_id — address image reference
  14. prefecture_code — 2-digit prefecture code
  15. city_code — municipality code
  16. postal_code — postal code
  17. address_outside_japan — address outside Japan, if any
  18. reserved_empty — reserved (empty)
  19. closing_date — registry closing date, if closed
  20. closing_reason — closing reason code, if closed
  21. succeeded_corporate_number — successor corporate number, if any
  22. change_cause — cause of change
  23. assignment_date — date the corporate number was assigned
  24. latest_history_flag — latest-history flag
  25. name_en — registered name (English), where published
  26. prefecture_en — prefecture (English)
  27. city_en — city (English)
  28. address_outside_japan_en — address outside Japan (English)
  29. name_kana — registered name (kana)
  30. non_display_flag — non-display flag

What this data is good for

  • Building or refreshing a Japan B2B sales list
  • Catching newly incorporated companies on the day they register
  • Market and competitor research on Japanese companies
  • A first-pass check of a counterparty's registered details

Limitations — please read

  • One day only. This sample covers the 2026-11-06 update. A single day shows what happened that day; it cannot show trends.
  • The counts are the records that changed that day, not the total number of companies in Japan.
  • "Closed" means the registry record was closed that day. It is not a count of all business closures in Japan.
  • The registry has no industry/sector column. Records cannot be filtered by industry.
  • Record accuracy follows the source publication (National Tax Agency).

The full products

This sample is the top of the RegBase funnel. The complete, verifiable packages — each shipped with a signed file list (a manifest carrying a digital stamp, Ed25519; if any file changes, the stamp stops matching) so you can confirm the files are byte-for-byte what RegBase produced:

A free sample of the snapshot's summary (counts and the column reference) is also available before purchase — see the product page above.

License

The underlying registry data is public data published by Japan's National Tax Agency (法人番号公表サイト) as open data; its use follows the source's published terms. RegBase's own work in this dataset — the record selection, the census summaries, and this documentation — is the compilation layer described above; please credit RegBase and the National Tax Agency when reusing the summary files. The sample records themselves remain source data: consult the National Tax Agency's terms for redistribution of registry records.

Source

  • National Tax Agency, Corporate Number Publication Site (法人番号公表サイト), daily diff for the 2026-11-06 update.
  • Listed-company cross-check: the code list from EDINET, Japan's official online disclosure system for listed companies (3,808 listed filers), as of 2026-11-07.
  • Zenodo deposit of this sample (archival copy with DOI): https://doi.org/10.5281/zenodo.24046548