Action summary

Company

木口建設株式会社Japanese original

Original: 木口建設株式会社

Corporate Number: 1260001018857

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

Business Suspension

営業停止

Action date

9 August 2022

Issuing authority

Okayama Prefecture

岡山県

Industry context

建設業者

Violation

Kiguchi Construction Co., Ltd. submitted false information claiming inflated completed project values in management review applications on September 30, 2021, and September 30, 2020, which were used to apply for construction bid qualification assessments for fiscal years 2024 and 2025. These actions are recognized as violations under Article 28, Paragraph 1, Item 2 of the Construction Business Act. The company was ordered by Okayama Prefecture to suspend operations for 30 days from August 23, 2022, to September 21, 2022, specifically for general building construction related to public works. The suspension applies to the scope of business involving public construction projects, including those commissioned by the national government, local governments, or designated public corporations, and certain private projects utilizing public funds. The violations stem from the company's submission of fraudulent management review applications, which led to the issuance of management review result notices used for bid qualification applications. The company's main office is located at 1905 Masamune-cho, Takahashi City, Okayama Prefecture.

Business location and permit details

Business location address

岡山県高梁市正宗町１９０５番地

Representative

木口 真佐樹

Permit / registration number

岡山県知事（特-29)第693号

Permitted business types

Building works, Carpentry works, Plastering works, Scaffolding, earthwork, and concrete works, Stone works, Roof works, Tile, brick, and block works, Steel structure works, Reinforcing bar works, Sheet-metal works, Glass works, Painting works, Waterproofing works, Interior finishing works, Thermal insulation works, Fittings works, Demolition works

Legal articles

建設業法第28条第3項(第1項第2号該当)

Cause of action

木口建設株式会社は、令和３年９月３０日を審査基準日とする経営事項審査を受審するに当たり、完成工事高を水増しした虚偽の内容を記載して申請を行った。 また、令和２年９月３０日を審査基準日とする経営事項審査においても、同様の虚偽申請を行い、当該申請により得た経営事項審査結果通知書をもって、本県に対し令和４年度・令和５年度建設工事入札参加資格審査の申請を行った。 このことは、建設業法第２８条第１項第２号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=507

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": "6e1adf4d-508b-4ed3-aff9-40147dbf339f",
    "url": "https://regbase.jp/en/enforcement/kensetsu-gyoho-mu-kou-jian-she-20220809",
    "company_name_original": "木口建設株式会社",
    "company_name_registry": "木口建設株式会社",
    "corporate_number": "1260001018857",
    "law": {
      "ja": "建設業法",
      "en": "Construction Business Act"
    },
    "action_type": {
      "ja": "営業停止",
      "en": "Business Suspension"
    },
    "authority": {
      "ja": "岡山県",
      "en": "Okayama Prefecture"
    }
  },
  "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": "Context needed",
    "actionMeaning": "This is a public Japanese regulatory disclosure. The exact legal effect depends on the cited source and regulator.",
    "practicalNote": "Review the original Japanese source and determine relevance to your counterparty-risk workflow.",
    "lawContext": "Construction business law covering licensing, contractor obligations, and public-interest rules for construction work."
  },
  "evidence": {
    "recordUrl": "https://regbase.jp/en/enforcement/kensetsu-gyoho-mu-kou-jian-she-20220809",
    "officialSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=507",
    "officialDocumentUrl": null,
    "archiveUrl": null,
    "archivedSourceUrl": null,
    "archiveCapturedAt": null,
    "extractedAt": "2026-07-17T11:56:25.97+00:00",
    "translatedAt": "2026-07-18T13:40:14.463+00:00",
    "evidenceCheckedAt": "2026-07-17T08:55:57.426+00:00",
    "generatedAt": "2026-07-27T00:27:53.549Z"
  },
  "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.