Japan Invoice Number Checker - T-Number Lookup

What is Japan Invoice Number Checker?

Japan Invoice Number Checker bulk-verifies Japanese qualified invoice issuer registration numbers (適格請求書発行事業者 登録番号, T-numbers: T + 13 digits) against the official National Tax Agency (NTA / 国税庁) open data. Paste any number of T-numbers and see for each one whether it is registered, revoked or expired, with the issuer's name, address, prefecture and registration dates. You can also search issuers by company name and prefecture to find a supplier's T-number. No application ID, no API key and no proxy needed.

インボイス制度の登録番号（T＋13桁）を国税庁の公表データで一括確認できます。取消・失効の判定、名称・都道府県での検索に対応しています。

• ✅ Official data: NTA month-end full file plus every daily diff file published since then, merged automatically.
• ✅ Bulk T-number check: one output row per input number, including not_found, invalid_format and invalid_check_digit, so you can reconcile every invoice.
• ✅ Name search: find corporations and associations by name (contains / starts with / exact), filtered by prefecture.
• ✅ No Web-API application ID: reads the NTA bulk download files, so you don't have to apply for API access.
• ✅ Cheap and predictable: $1.50 per 1,000 results, platform usage included.

Use cases for T-number verification

• 🧾 Invoice compliance (インボイス制度): check that the registration number on each supplier invoice is valid before claiming input tax credit (仕入税額控除).
• 🏭 Supplier and vendor master clean-up: flag suppliers whose registration was revoked (取消) or expired (失効).
• 🤖 AP automation: plug the check into accounts-payable or OCR pipelines through the API.
• 🔎 KYC / KYB enrichment: confirm a Japanese counterparty's official name and head-office address.
• 🗂️ CRM enrichment: find the T-number of known companies with the name search.

What data does the T-number lookup return?

Field	Meaning
registrationNumber, corporateNumber, input	Normalized T-number, the 13-digit corporate number (法人番号), and what you typed
found, registered, status	registered, revoked, expired, scheduled, deleted_from_registry, not_found, invalid_format, invalid_check_digit
name, kana, tradeName, popularNamePreviousName	Name (氏名又は名称) and other published names
address, addressHeadOffice, prefecture, prefectureCode, cityCode	Published address (所在地) and codes
registrationDate, disposalDate, expireDate, updateDate	Registered on, revoked on (取消年月日), expired on (失効年月日), last update
personType, entityCategory, country	Corporation / individual, domestic / foreign
history[], historyCount	Earlier registration events (optional)
dataAsOf, diffsAppliedThrough, sourceFiles	Snapshot date and the latest daily diff applied
source, sourceUrl, license, licenseUrl, attribution, processingNote, retrievedAt	Source and the required 出典 / 加工 notice

status is computed for the run date (JST): revoked if disposalDate ≤ today, expired if expireDate ≤ today, scheduled if registrationDate > today.

How to check Japanese invoice registration numbers in bulk

1. Click Try for free (or Start) on this page.
2. Paste your T-numbers into Registration numbers (T-numbers), one per line. The leading T, hyphens, spaces and full-width digits are all accepted, and the check digit is validated.
3. Optionally enter a Name search (e.g. トヨタ自動車) and pick Prefectures to find issuers by name.
4. Click Start. Four company numbers take about 25 seconds on the default 512 MB memory.
5. Open the Output tab or export the results as JSON, CSV, Excel, XML or HTML.

Input example

{
  "registrationNumbers": ["T7010401022916", "1180301018771"],
  "nameQuery": "トヨタ自動車",
  "prefectures": ["23"],
  "maxItems": 50
}

Field	Description
registrationNumbers	List of T-numbers. One record per number.
nameQuery	Optional name search (corporations & associations), ≥ 2 characters. NFKC/width/case/space-insensitive.
nameMatch	contains (default), startsWith, exact.
prefectures	Optional JIS codes 01–47 (00 = foreign) to filter name search and narrow downloads.
onlyRegistered	Name search: drop revoked/expired issuers.
maxItems	Max dataset records (default 100, up to 50,000). Raise it when you check more than 100 T-numbers.
includeIndividuals	Also scan sole-proprietor files if a number is not found among corporations (default true).
applyDailyDiffs	Merge daily diff files since the month-end snapshot (default true).
includeHistory	Add history entries.
includeNotFound	Output found:false records for unknown / invalid numbers (default true).

Output example

Field names follow the NTA resource definition (リソース定義書 1.5):

{
  "input": "T7010401022916",
  "registrationNumber": "T7010401022916",
  "corporateNumber": "7010401022916",
  "found": true,
  "registered": true,
  "status": "registered",
  "name": "日本電気株式会社",
  "kana": null,
  "nameWithheld": false,
  "address": "東京都港区芝５丁目７番１号",
  "addressHeadOffice": "東京都港区芝５丁目７番１号",
  "prefectureCode": "13",
  "prefecture": "東京都",
  "cityCode": "13103",
  "registrationDate": "2023-10-01",
  "updateDate": "2021-10-29",
  "disposalDate": null,
  "expireDate": null,
  "personType": "corporation",
  "entityCategory": "corporation",
  "country": "domestic",
  "processLabel": "new_registration",
  "matchedBy": "registrationNumber",
  "dataAsOf": "2026-09-30",
  "diffsAppliedThrough": "2026-10-06",
  "sourceFiles": ["h_all_20260930_csv_002.zip"],
  "source": "National Tax Agency Japan - Qualified Invoice Issuer Publication Site (国税庁適格請求書発行事業者公表サイト), bulk download data",
  "sourceUrl": "https://www.invoice-kohyo.nta.go.jp/download/zenken",
  "license": "Public Data License v1.0 (公共データ利用規約 第1.0版)",
  "licenseUrl": "https://www.digital.go.jp/resources/open_data/public_data_license_v1.0",
  "attribution": "出典：国税庁適格請求書発行事業者公表サイト（国税庁）（https://www.invoice-kohyo.nta.go.jp/download/）、PDL1.0（https://www.digital.go.jp/resources/open_data/public_data_license_v1.0）。全件・差分データをもとにApifyアクター「japan-invoice-lookup」（1rrock）が加工して作成",
  "retrievedAt": "2026-10-07T05:30:45Z"
}

How much does it cost to check T-numbers?

This Actor uses pay-per-result pricing: $1.50 per 1,000 results ($0.0015 per record), with Apify platform usage already included. Apify also charges a tiny Actor start fee of $0.00005 per run per GB of memory.

• What counts as a result? Every record written to the dataset. Each input T-number produces one record, including not_found and invalid numbers (useful for invoice verification). If you don't want to pay for those, set includeNotFound: false. Each name-search hit is also one result, capped by maxItems (default 100).
• Temporary failures are not charged. If the NTA download site is unreachable or returns an error, the run fails with a clear message instead of writing error rows, so you are never charged for a source outage (records already found before the error are kept).
• How many numbers fit in one run? At the default maxItems of 100, one run outputs at most 100 records (extra numbers are skipped with a warning). Set maxItems up to 50,000 to check more in a single run. Run time depends on which NTA files must be read, not on how many numbers you give: corporate numbers usually finish in well under a minute to a few minutes, so thousands of numbers fit in the default 30-minute timeout. Sole-proprietor numbers that need the individuals files take longer; if a very large job times out, raise the run timeout or split it into several runs.
• Examples: checking 1,000 supplier T-numbers (with maxItems: 1000) ≈ $1.50. The default input (4 numbers) ≈ $0.006.
• Free plan: Apify's free plan includes $5 of monthly usage, which covers about 3,000 results.

Use the invoice number API from Python, JavaScript or no-code tools

Python (apify-client):

from apify_client import ApifyClient

client = ApifyClient("<YOUR_APIFY_TOKEN>")
run = client.actor("1rrock/japan-invoice-lookup").call(
    run_input={"registrationNumbers": ["T7010401022916", "T1180301018771"]}
)
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(item["registrationNumber"], item["status"], item.get("name"))

JavaScript / Node.js (apify-client):

import { ApifyClient } from 'apify-client';

const client = new ApifyClient({ token: '<YOUR_APIFY_TOKEN>' });
const run = await client.actor('1rrock/japan-invoice-lookup').call({
    registrationNumbers: ['T7010401022916', 'T1180301018771'],
    includeNotFound: true,
});
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((i) => console.log(i.registrationNumber, i.status, i.name));

HTTP (one call, returns the results):

curl -X POST "https://api.apify.com/v2/acts/1rrock~japan-invoice-lookup/run-sync-get-dataset-items?token=<YOUR_APIFY_TOKEN>" \
  -H "Content-Type: application/json" \
  -d '{"registrationNumbers": ["T7010401022916"]}'

No-code: connect the Actor to Zapier, Make, Google Sheets (with Google Sheets Import & Export), webhooks and other integrations. For a monthly supplier re-check, run it on a schedule. AI agents can call it through the Apify MCP server.

How it works

The NTA publishes the whole register as downloadable CSV zip files (https://www.invoice-kohyo.nta.go.jp/download/). The Actor reads the download pages, fetches only the files it needs (diffs → associations → corporate regional groups → individuals only if still not found), streams the CSV inside each zip with constant memory, and stops reading a file as soon as it has passed the requested numbers (the files are sorted by number). It does not use the site's per-number search page (scraping it is prohibited by the site's terms) or the Web-API (which requires an application ID).

Measured on the Apify platform with the default 512 MB memory: 4 company numbers ≈ 25 s (≈ 41 MB downloaded); a nationwide name search plus an individual T-number ≈ 2 min (≈ 125 MB downloaded). Peak memory stays below ~100 MB. Giving the run more memory also gives it more CPU, which makes large scans faster.

FAQ

Is it legal to use this data?

Yes. The NTA publishes the bulk data under the Public Data License 1.0 (PDL1.0), which is compatible with CC BY 4.0 and allows commercial use with attribution and a note when the data was processed. Every record includes the required 出典 / 加工 text. The Actor does not scrape the per-number search page, which the site's terms prohibit.

How fresh is the data?

Month-end full data plus daily diffs. The NTA publishes diffs after 06:00 JST on the next working day, so registrations processed today appear tomorrow. Each record shows dataAsOf and diffsAppliedThrough.

Why is the name empty for some numbers?

Sole proprietors: since Sept 2022 the NTA removes names, trade names, kana and published addresses of individuals from the bulk files. For individual T-numbers you get the registration status and dates only (name: null, nameWithheld: true), and individuals cannot be searched by name. Use the official site (https://www.invoice-kohyo.nta.go.jp/) to view an individual's name.

Can I check whether a number was valid on a past invoice date?

The record includes registrationDate, disposalDate and expireDate, so you can compare them with your invoice date. With includeHistory you also get earlier registration events. Only the latest name and address are in the bulk data.

Are there limits?

maxItems (default 100) caps the records per run; it can be raised to 50,000. Large nationwide name searches download more files and take longer (about 2 minutes). For more than 50,000 records, split the job into several runs (for example by prefecture).

Personal data

The NTA warns that republishing personal information (names, registration numbers) without consent may conflict with Japan's Act on the Protection of Personal Information. Use results for verification, not for publishing lists of individuals.

Data source and license

出典：国税庁適格請求書発行事業者公表サイト（国税庁）（https://www.invoice-kohyo.nta.go.jp/download/）、 PDL1.0. This actor downloads, merges and normalizes the NTA full and diff data files (加工して作成). It is not an official NTA service and the NTA is not responsible for its output. Site terms of use: https://www.invoice-kohyo.nta.go.jp/terms-of-use.html

日本語概要

適格請求書発行事業者の登録番号（T＋13桁）を国税庁公表サイトの全件・差分ダウンロードデータで一括確認する Apifyアクターです。アプリケーションID不要。名称検索・都道府県絞り込み・取消/失効判定に対応。個人事業者の 氏名等はダウンロードデータで削除されているため、個人については登録状況と日付のみ返します。

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