> ## Documentation Index > Fetch the complete documentation index at: https://docs.usecroma.com/llms.txt > Use this file to discover all available pages before exploring further. # National Tax Agency Company > Retrieve one Japanese company or other legal entity by its 13-digit corporate number (法人番号), e.g. `1180301018771`: the registered name with its reading and English form, the legal form, the head office, the registration status with any closure and successor, and the last change the register recorded. Served by Croma from its copy of the register (`as_of` says how current the data is). **Dataset endpoint**: answers from the whole source in milliseconds and carries `as_of`. ## OpenAPI ````yaml /api-reference/openapi.json post /jp/nta/company/v1 openapi: 3.1.0 info: title: Croma Marketplace API version: 1.0.0 description: >- Government-data APIs for Colombia, Peru, Mexico, United States, Brazil, El Salvador, Bolivia, and Japan, plus global web search. Croma normalizes public-sector data into structured JSON for product teams and AI agents. Every operation is a POST with a JSON body and an organization API key as a bearer token; every operation is an idempotent lookup and accepts an optional `Idempotency-Key` header. Paths carry their major version (`/v1`); the versioning and deprecation policy, including the `Deprecation` and `Sunset` headers a retiring endpoint sends, is at https://docs.usecroma.com/versioning. Rate limits are per organization and reported on every response (`RateLimit-Policy`, `X-RateLimit-*`): https://docs.usecroma.com/rate-limits. termsOfService: https://usecroma.com/en/terms contact: name: Croma support url: https://usecroma.com/en/support email: support@usecroma.com servers: - url: https://api.croma.run security: [] paths: /jp/nta/company/v1: post: tags: - Japan - National Tax Agency of Japan summary: National Tax Agency Company description: >- Retrieve one Japanese company or other legal entity by its 13-digit corporate number (法人番号), e.g. `1180301018771`: the registered name with its reading and English form, the legal form, the head office, the registration status with any closure and successor, and the last change the register recorded. Served by Croma from its copy of the register (`as_of` says how current the data is). **Dataset endpoint**: answers from the whole source in milliseconds and carries `as_of`. operationId: nta_company parameters: - $ref: '#/components/parameters/IdempotencyKey' requestBody: required: true content: application/json: schema: type: object required: - corporate_number properties: corporate_number: type: string minLength: 13 maxLength: 20 pattern: ^\d{13}$ description: >- The company's 13-digit corporate number (法人番号), e.g. `1180301018771`. The first digit checks the other twelve. additionalProperties: false example: corporate_number: '1180301018771' responses: '200': description: Successful response headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' Idempotency-Key: $ref: '#/components/headers/Idempotency-Key' Deprecation: $ref: '#/components/headers/Deprecation' Sunset: $ref: '#/components/headers/Sunset' X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' X-Cache: $ref: '#/components/headers/X-Cache' content: application/json: schema: $ref: '#/components/schemas/NtaCompanyResponse' '400': description: Invalid request body headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' Idempotency-Key: $ref: '#/components/headers/Idempotency-Key' Deprecation: $ref: '#/components/headers/Deprecation' Sunset: $ref: '#/components/headers/Sunset' content: application/json: schema: $ref: '#/components/schemas/ApiError' '401': description: Missing or invalid API key headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' Idempotency-Key: $ref: '#/components/headers/Idempotency-Key' Deprecation: $ref: '#/components/headers/Deprecation' Sunset: $ref: '#/components/headers/Sunset' content: application/json: schema: $ref: '#/components/schemas/ApiError' '429': description: Rate limit exceeded headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' Idempotency-Key: $ref: '#/components/headers/Idempotency-Key' Deprecation: $ref: '#/components/headers/Deprecation' Sunset: $ref: '#/components/headers/Sunset' X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' Retry-After: $ref: '#/components/headers/Retry-After' content: application/json: schema: $ref: '#/components/schemas/ApiError' '500': description: Internal error headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' Idempotency-Key: $ref: '#/components/headers/Idempotency-Key' Deprecation: $ref: '#/components/headers/Deprecation' Sunset: $ref: '#/components/headers/Sunset' content: application/json: schema: $ref: '#/components/schemas/ApiError' '502': description: Upstream source returned an error headers: X-Request-Id: $ref: '#/components/headers/X-Request-Id' RateLimit-Policy: $ref: '#/components/headers/RateLimit-Policy' Idempotency-Key: $ref: '#/components/headers/Idempotency-Key' Deprecation: $ref: '#/components/headers/Deprecation' Sunset: $ref: '#/components/headers/Sunset' content: application/json: schema: $ref: '#/components/schemas/ApiError' security: - bearerAuth: [] externalDocs: description: Interactive documentation and examples url: https://docs.usecroma.com/guides/japan/nta components: parameters: IdempotencyKey: name: Idempotency-Key in: header required: false description: >- Optional client-chosen key for this request (any string up to 255 characters, e.g. a UUID). Every Croma operation is an idempotent lookup: repeating a request with the same body returns the same result and creates nothing, so retrying after a timeout or network failure is always safe. The key is echoed back in the `Idempotency-Key` response header so you can correlate a retry with its first attempt. Each attempt that reaches the API counts against the rate limit. schema: type: string maxLength: 255 example: 0f8e9a42-6b7c-4d1e-9a3f-2c5d7e8f9a0b headers: X-Request-Id: description: Unique id for the request (req_…). Include it in support reports. schema: type: string RateLimit-Policy: description: >- Quota policy for this endpoint as an IETF RateLimit-Policy structured field, e.g. `"default";q=100;w=86400` (100 requests per 86400-second window per organization). Endpoints with an extra hourly ceiling list both policies, e.g. `"webSearch";q=100;w=3600, "default";q=100;w=86400`. Present on every response, including 401 and 429. schema: type: string example: '"default";q=100;w=86400' Idempotency-Key: description: >- The `Idempotency-Key` the request carried, echoed back unchanged. Absent when the request sent none. schema: type: string Deprecation: description: >- Present only on an endpoint version scheduled for removal: the date the deprecation took effect (RFC 9745). A `Sunset` header and a `Link` with `rel="successor-version"` accompany it. Policy: https://docs.usecroma.com/versioning schema: type: string example: '@1767225600' Sunset: description: >- Present only on an endpoint version scheduled for removal: the date after which it answers 410 (RFC 8594). Announced in the changelog at least 90 days ahead. schema: type: string format: date-time example: Wed, 01 Apr 2026 00:00:00 GMT X-RateLimit-Limit: description: Requests allowed in the current window. schema: type: integer X-RateLimit-Remaining: description: Requests left before you are throttled. schema: type: integer X-RateLimit-Reset: description: ISO 8601 timestamp when the window resets. schema: type: string format: date-time X-Cache: description: >- HIT or MISS. Cached hits spend no credits, but still count toward an hourly ceiling. schema: type: string enum: - HIT - MISS Retry-After: description: Seconds to wait before retrying. schema: type: integer schemas: NtaCompanyResponse: type: object required: - data properties: data: $ref: '#/components/schemas/NtaCompanyData' ApiError: type: object required: - error properties: error: type: object required: - type - code - message properties: type: type: string description: >- Broad category: invalid_request_error, authentication_error, not_found_error, rate_limit_error, upstream_error, api_error. code: type: string description: Machine-readable specific code. message: type: string description: Human-readable explanation, safe to surface in UI. param: type: string description: Field that triggered the error. Present on validation errors. details: type: object description: Free-form structured detail. NtaCompanyData: type: object properties: as_of: anyOf: - type: string - type: 'null' description: How current the data in this response is. found: type: boolean corporate_number: type: string company: anyOf: - type: object properties: corporate_number: type: string description: >- The 13-digit corporate number (法人番号) the National Tax Agency assigned, e.g. "1180301018771". The first digit checks the other twelve. name: type: string description: >- The company's name (商号又は名称) as registered, e.g. "トヨタ自動車株式会社". Cut at 150 characters by the register; `name_image_url` then carries the whole of it. name_kana: anyOf: - type: string - type: 'null' description: >- The reading of the name in katakana (フリガナ), when the register records one. name_en: anyOf: - type: string - type: 'null' description: The name in English, when the company registered one. entity_type: type: string enum: - national_government - local_government - kabushiki_kaisha - yugen_kaisha - gomei_kaisha - goshi_kaisha - godo_kaisha - other_registered - foreign_company - other description: >- The legal form: `kabushiki_kaisha` (株式会社), `yugen_kaisha` (有限会社), `gomei_kaisha` (合名会社), `goshi_kaisha` (合資会社), `godo_kaisha` (合同会社), `other_registered` (any other registered entity: 一般社団法人, 医療法人, 学校法人, 宗教法人...), `foreign_company` (外国会社), `national_government`, `local_government` or `other`. entity_type_label: type: string description: >- The legal form as the register labels it, e.g. "株式会社", "その他の設立登記法人". prefecture: anyOf: - type: string - type: 'null' description: >- The prefecture of the head office (国内所在地), e.g. "愛知県", "東京都". Null for a company whose only address is abroad. prefecture_code: anyOf: - type: string - type: 'null' description: >- The prefecture's two-digit JIS X 0401 code, e.g. "23" for 愛知県, "13" for 東京都. city: anyOf: - type: string - type: 'null' description: >- The city, ward, town or village of the head office, e.g. "豊田市", "千代田区". city_key: anyOf: - type: string - type: 'null' description: >- `city` folded for matching (compatibility forms normalized, lowercased), which is what the `city` filter matches from the start. city_code: anyOf: - type: string - type: 'null' description: The municipality's five-digit JIS X 0402 code, e.g. "23211". street: anyOf: - type: string - type: 'null' description: >- The rest of the head office address (丁目番地等), e.g. "トヨタ町1番地". Cut at 300 characters by the register; `address_image_url` then carries the whole address. postal_code: anyOf: - type: string - type: 'null' description: >- The seven-digit postal code the register derives from the address. Derived, so it can be wrong or missing. prefecture_en: anyOf: - type: string - type: 'null' description: >- The prefecture in English, when the company registered its address in English. city_en: anyOf: - type: string - type: 'null' description: >- The city and the rest of the address in English, when the company registered them. address_outside_japan: anyOf: - type: string - type: 'null' description: >- The address abroad (国外所在地) for a foreign company, as registered. address_outside_japan_en: anyOf: - type: string - type: 'null' description: The address abroad in English, when registered. status: type: string enum: - active - closed - deleted description: >- `active` while the register record is open, `closed` once it was closed (see `close_reason`), `deleted` when the register removed the number. closed_at: anyOf: - type: string - type: 'null' description: >- `yyyy-mm-dd` the register record was closed. Null while active. close_reason: anyOf: - type: string enum: - liquidation - merger - registrar - other_liquidation - type: 'null' description: >- Why the record was closed: `liquidation` (清算の結了等), `merger` (合併による解散等), `registrar` (登記官による閉鎖) or `other_liquidation` (その他の清算の結了等). Null while active. successor_corporate_number: anyOf: - type: string - type: 'null' description: >- The corporate number of the company this one was merged into, when it closed by merger. assigned_at: anyOf: - type: string - type: 'null' description: >- `yyyy-mm-dd` the corporate number was assigned. `2015-10-05` for every company that existed when the system started. updated_at: type: string description: >- `yyyy-mm-dd` the register last changed the record; what `from_date` and `to_date` filter on. changed_at: anyOf: - type: string - type: 'null' description: >- `yyyy-mm-dd` of the event behind the last change (the registration date of the change), when the register states it. change_type: type: string enum: - new - name_change - address_change - foreign_address_change - closed - revived - merger - merger_annulled - trade_name_erased - deleted description: >- The last change the register recorded: `new`, `name_change`, `address_change`, `foreign_address_change`, `closed`, `revived`, `merger`, `merger_annulled`, `trade_name_erased` or `deleted`. change_details: anyOf: - type: string - type: 'null' description: >- The register's own note on the last change (変更事由の詳細), when it wrote one. hidden: type: boolean description: >- True for a company the register keeps out of its own name search; it is then found only by its corporate number here as well. name_image_url: anyOf: - type: string - type: 'null' description: >- Croma's copy of the image the register publishes for a name it cannot print in full (characters outside JIS, or more than 150 characters), byte for byte. Null for almost every company. source_name_image_url: anyOf: - type: string - type: 'null' description: The register's own link to that image. address_image_url: anyOf: - type: string - type: 'null' description: >- Croma's copy of the image the register publishes for an address it cannot print in full. Null for almost every company. source_address_image_url: anyOf: - type: string - type: 'null' description: The register's own link to that image. foreign_address_image_url: anyOf: - type: string - type: 'null' description: >- Croma's copy of the image the register publishes for an address abroad it cannot print in full. source_foreign_address_image_url: anyOf: - type: string - type: 'null' description: The register's own link to that image. official_url: type: string description: >- The company's page at the National Tax Agency's corporate number site. required: - corporate_number - name - name_kana - name_en - entity_type - entity_type_label - prefecture - prefecture_code - city - city_key - city_code - street - postal_code - prefecture_en - city_en - address_outside_japan - address_outside_japan_en - status - closed_at - close_reason - successor_corporate_number - assigned_at - updated_at - changed_at - change_type - change_details - hidden - name_image_url - source_name_image_url - address_image_url - source_address_image_url - foreign_address_image_url - source_foreign_address_image_url - official_url - type: 'null' required: - as_of - found - corporate_number - company securitySchemes: bearerAuth: type: http scheme: bearer description: 'Use Authorization: Bearer YOUR_API_KEY' ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.