Japan Construction & Real-Estate Licenses (MLIT)

Licensed Japanese construction contractors and real-estate brokers, from MLIT's official register — filterable by industry and region, with license numbers and validity dates.

This Actor searches the Ministry of Land, Infrastructure, Transport and Tourism's official company-information system (建設業者・宅建業者等企業情報検索システム, etsuran2.mlit.go.jp) — the register behind Japan's roughly 470,000 construction licenses — and returns corporate license holders as English-schema JSON: company name with katakana reading, license number and issuing authority, the held construction industries (29 statutory categories, English names, general/specific class), license validity period as ISO dates, capital, and municipality-level location.

Unofficial tool. Not affiliated with or endorsed by MLIT or the Government of Japan. Records are edited/processed data from the register (出典：国土交通省 建設業者・宅建業者等企業情報検索システムを編集・加工して作成), published under 公共データ利用規約（第1.0版）(PDL 1.0) — commercial reuse permitted with attribution and a processed-data notice, both embedded in every record.

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Who is this for?

• B2B sales to the construction sector — construction machinery, building materials, insurance, and SaaS vendors building lead lists of licensed contractors by industry (e.g., all governor-licensed roofing contractors in Osaka) with license class and capital as qualifiers.
• Proptech and real-estate teams — enumerate licensed brokers (宅地建物取引業者) by region, with license renewal counts as a longevity signal.
• Counterparty verification — confirm a contractor's license number, held industries, class, and validity period against the official register before contracting.

Sample output (dataset item)

{
  "companyName": "（株）○○建設",
  "companyNameKana": "マルマルケンセツ",
  "businessType": "construction",
  "licenseNo": "第011808号",
  "licenseAuthority": "福井県",
  "licenseType": "governor",
  "industries": [
    { "code": 1, "abbrJa": "土", "nameJa": "土木工事業", "nameEn": "Civil engineering", "licenseClass": "general" },
    { "code": 2, "abbrJa": "建", "nameJa": "建築工事業", "nameEn": "Building construction", "licenseClass": "general" }
  ],
  "prefecture": "福井県",
  "prefectureCode": "18",
  "prefectureEn": "Fukui",
  "address": "福井県福井市",
  "validFrom": "2024-01-30",
  "validTo": "2029-01-29",
  "capitalThousandJpy": 5000,
  "entityVerification": "corporate",
  "detailFetched": true,
  "source": "国土交通省 建設業者・宅建業者等企業情報検索システム",
  "sourceUrl": "https://etsuran2.mlit.go.jp/TAKKEN/",
  "license": "公共データ利用規約（第1.0版）PDL1.0 — 編集・加工して作成",
  "retrievedAt": "2026-08-25T09:12:44Z"
}

Input example

{
  "businessType": "construction",
  "prefecture": "Osaka",
  "industryCode": "8",
  "industryType": "general",
  "licenseType": "governor",
  "maxItems": 200
}

At least one search criterion is required — unfiltered national dumps are not supported, by design. Filters: prefecture, one of the 29 statutory industries (+ general/specific class), partial company name (kanji or katakana), minister vs governor license.

Pricing

Pay per result — see the pricing tab. A prefecture × industry roster is typically tens to a few hundred records.

FAQ

Where does the data come from? Live from MLIT's official search system, which the ministry updates about twice a month for the construction and real-estate registers. Every record embeds the source, the register URL, the PDL 1.0 license designation, and the retrieval timestamp.

Is this an official government service? No. Unofficial, independently built and maintained, using MLIT's publicly available register under PDL 1.0 with the required attribution.

Are sole proprietors included? No — corporate entities only, and honestly enforced: the register itself records a 法人・個人区分 (corporate/individual) flag, and the Actor excludes individuals using that authoritative flag (in cheap list-only mode, a conservative corporate-name test is used instead, and entityVerification tells you which check each record passed). Representative names and phone numbers are never extracted — the parser locates those columns specifically so it can refuse to read them — and addresses are truncated to municipality level. A run summary reports how many records were excluded, so the filtering is visible.

Why is the address only city-level? Deliberate privacy posture (small operators' registered addresses can be homes) — and for lead-list and verification use cases, prefecture + municipality is what you actually need. If address parsing is ambiguous, the Actor falls back to prefecture only; it never errs toward leaking a street address.

Is this every licensed contractor in Japan? The register is the official national one (construction licenses on the order of 470,000). What one run returns is your search's result set, subject to your filters, maxItems, and the polite request budget — the run summary flags complete: false whenever a budget truncated the roster, so you always know whether you got everything you asked for.

What about server load? Strictly serial requests, ≥1.2 s apart, 50 rows per search page, one extra request per company detail, hard per-run budget, exponential backoff, no block evasion. If the site's format changes, the Actor stops with a clear error instead of silently mis-parsing.

Search terms this Actor answers

Japan construction companies database · licensed contractors Japan · Japan general contractor list · 建設業許可 data English · Japan real estate broker license lookup · takken license search · Japan construction industry leads · MLIT contractor register

More Japan public-data Actors by the same developer

• Japan Government Tenders & Awards — tender notices and award results (who wins public-works contracts) from the kkj.go.jp portal.
• Japan Medical Facilities — every registered hospital, clinic, dental clinic, and pharmacy (MHLW open data).
• Japan Care Facilities — long-term care providers across 35 service types (MHLW open data, CC BY).
• Japan Government Subsidies & Grants — open subsidy calls from the official jGrants API.
• Japan Renewable Energy FIT/FIP Facilities — METI-certified renewable installations, privacy-safe schema.
• Japan Financial Licenses & Registrations — FSA-licensed banks, securities firms, crypto exchanges and more.
• Japan Trade Statistics — monthly import/export flows by HS code and partner country, from Japan Customs.

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Data source: 国土交通省 建設業者・宅建業者等企業情報検索システム — https://etsuran2.mlit.go.jp/TAKKEN/ . PDL 1.0; attribution and processing notice embedded in every record.