Action summary

Company

西武建設株式会社Japanese original

Original: 西武建設株式会社

Corporate Number: 3013301006249

Entity match

Confirmed entity match100/100Machine checked

source_corporate_number_nta_current_name

国税庁法人番号データとの独立照合で対象法人を確認しました（source_corporate_number_nta_current_name）。

Governing law

Construction Business Act

建設業法

Action type

Directive

指示

Action date

21 July 2023

Issuing authority

Kantō Regional Development Bureau

関東地方整備局

Industry context

建設業者

Violation

Seibu Kensetsu Co., Ltd. violated Article 15, Item 2 of the Construction Business Act by assigning personnel who did not meet qualification requirements as the sole technical officer at its office. This violation is recognized as falling under Article 28, Paragraph 1 of the Act. The company is located at 1-11-1 Kusunoki-dai, Tokorozawa City, Saitama Prefecture, with permit number Kokkyo Kotsu Daijin (Toku-4) No. 002389. The order, issued by the Kanto Regional Development Bureau on July 21, 2023, includes measures to prevent recurrence, such as promptly informing staff of the violation and sanctions, conducting training to ensure compliance with relevant laws, and reviewing internal operations and management systems. The company’s representative is Sato Makoto. The violation involved placing personnel who did not meet qualification requirements as the technical officer, which is a breach of the Construction Business Act. The order emphasizes the need for the company to implement necessary corrective actions and report in writing.

Business location and permit details

Business location address

埼玉県所沢市くすのき台１－１１－１

Representative

佐藤 誠

Permit / registration number

国土交通大臣（特－４）第002389号

Permitted business types

Civil engineering works, Building works, Carpentry works, Scaffolding, earthwork, and concrete works, Stone works, Roof works, Electrical works, Pipe works, 夕, Steel structure works, Paving works, Dredging works, Glass works, Painting works, Waterproofing works, Interior finishing works, Machinery and equipment installation works, Landscaping works, Fittings works, Water facilities works, Demolition works

Legal articles

建設業法第28条第1項本文

Cause of action

西武建設株式会社は、建設業法第１５条第２号の規定に違反して、資格要件を満たさない者を営業所の専任技術者として配置していた。 このことが、建設業法第２８条第１項本文に該当すると認められる。

Overview page

https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=1220

These fields are extracted from the original Japanese disclosure or linked overview pages when available.

This context is an operational aid for review workflows, not a credit opinion or legal conclusion.

Evidence pack

{
  "record": {
    "id": "d7d3299b-1895-4326-a5fb-28f5c776db57",
    "url": "https://regbase.jp/en/enforcement/kensetsu-gyoho-xi-wu-jian-she-20230721-2",
    "company_name_original": "西武建設株式会社",
    "company_name_registry": "西武建設株式会社",
    "corporate_number": "3013301006249",
    "law": {
      "ja": "建設業法",
      "en": "Construction Business Act"
    },
    "action_type": {
      "ja": "指示",
      "en": "Directive"
    },
    "authority": {
      "ja": "関東地方整備局",
      "en": "Kantō Regional Development Bureau"
    }
  },
  "entity_match": {
    "status": "confirmed",
    "confidence": 100,
    "method": "source_corporate_number_nta_current_name",
    "method_label": "source_corporate_number_nta_current_name",
    "notes": "国税庁法人番号データとの独立照合で対象法人を確認しました（source_corporate_number_nta_current_name）。"
  },
  "review": {
    "status": "machine_reviewed",
    "label": "Machine checked"
  },
  "compliance_context": {
    "severity": "Medium",
    "actionMeaning": "A regulator issued a directive requiring specified action.",
    "practicalNote": "Verify the required action and whether the company has disclosed remediation or completion.",
    "lawContext": "Construction business law covering licensing, contractor obligations, and public-interest rules for construction work."
  },
  "evidence": {
    "recordUrl": "https://regbase.jp/en/enforcement/kensetsu-gyoho-xi-wu-jian-she-20230721-2",
    "officialSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=1220",
    "officialDocumentUrl": null,
    "archiveUrl": null,
    "archivedSourceUrl": null,
    "archiveCapturedAt": null,
    "extractedAt": "2026-07-17T11:56:25.97+00:00",
    "translatedAt": "2026-07-18T15:20:14.817+00:00",
    "evidenceCheckedAt": "2026-07-17T08:51:00.821+00:00",
    "generatedAt": "2026-07-28T15:25:08.320Z"
  },
  "limitations": [
    "RegBase aggregates public Japanese government disclosures and does not provide a credit opinion.",
    "English summaries are provided for reference. The original Japanese source is authoritative.",
    "Possible or unresolved entity matches should be manually verified before use in a decision."
  ]
}

The original Japanese disclosure is the authoritative record. Use possible or unresolved matches only as leads for manual review.