Enforcement record

Business Suspension against 小久保鉄筋工業株式会社

小久保鉄筋工業株式会社 (Construction Business Act)

This page is one enforcement record linked to a confirmed legal entity. Company-level Official Gazette notices, registry data, related-company signals, and other public records are collected on the company profile.

View company profile
Construction Business ActKantō Regional Development BureauConfirmed entity match9 June 2026

Action type

Business Suspension

Law

Construction Business Act

Authority

Kantō Regional Development Bureau

Action date

9 June 2026

Current page: Enforcement record

This screen focuses on one disclosed action: governing law, authority, facts, source status, and review evidence. Open the company profile for company-level registry, Official Gazette, and related-company context.

Free report

Save a public-record evidence report for 小久保鉄筋工業株式会社

Includes confirmed target-entity identifiers, regulator, governing law, source links, archive status, and reviewer note fields for internal due-diligence files.

Related tool Kiroku

Track website changes for 小久保鉄筋工業株式会社

After checking public records, use Kiroku to save and monitor official websites, terms, IR pages, pricing pages, announcements, and other URLs that may change over time.

Open website change monitoring
For developers: JSON integration details

You do not need this for normal browsing. Use it only when integrating this enforcement record into an internal tool or AI workflow.

/api/v1/enforcements?corporate_number=2030001085408&limit=10

Action summary

Company
Original: 小久保鉄筋工業株式会社
Corporate Number: 2030001085408
Entity match
Confirmed entity match100/100Machine checked
source_corporate_number_nta_verified
Corporate Number 2030001085408 was present in the public disclosure and verified against the NTA full-download index (小久保鉄筋工業株式会社).
Governing law
Construction Business Act
建設業法
Action type
Business Suspension
営業停止
Action date
9 June 2026
Issuing authority
Kantō Regional Development Bureau
関東地方整備局
Industry context
建設業者

Violation

Machine-translated summary — verify against original

The representative director of Kobukubo Rebar Construction Co., Ltd. engaged in labor law violations by having three workers perform overtime and holiday work beyond the hours specified in agreements related to a one-year variable work hour system, between June 21 and July 20, 2024, without legal exemption. On January 9, 2026, the company and its representative director received a summary order from the Omiya Summary Court for violating the Labor Standards Act, each fined 300,000 yen, with the penalties finalized. This conduct is deemed to fall under Article 28, Paragraph 1, Item 3 of the Construction Business Act. As a result, the Kanto Regional Development Bureau issued a three-day business suspension from June 24 to June 26, 2026, covering all construction business activities related to rebar work nationwide at the company's main office located at 245 Iizuka, Kumagaya City, Saitama Prefecture.

Show original Japanese text

小久保鉄筋工業株式会社の代表取締役は、同社の業務に関し、法定の除外事由がないのに、労働者3名に対し、令和6年6月21日から令和6年7月20日までの間に、1年単位の変形労働時間制に関する協定、時間外労働及び休日労働に関する協定に定めた時間を超えて、時間外労働及び休日労働をさせた。 この件について、令和8年1月9日、大宮簡易裁判所から同社及び同社代表取締役が労働基準法違反で略式命令(いずれも罰金30万円)を受け、その刑が確定している。 このことが、建設業法第28条第1項第3号に該当すると認められる。

Business location and permit details

Business location address
埼玉県熊谷市飯塚245-9
Representative
小久保 和成
Permit / registration number
国土交通大臣許可(般-7)第029505号
Permitted business types
Reinforcing bar works
Legal articles
建設業法第28条第3項(同条第1項第3号該当)
Cause of action
小久保鉄筋工業株式会社の代表取締役は、同社の業務に関し、法定の除外事由がないのに、労働者3名に対し、令和6年6月21日から令和6年7月20日までの間に、1年単位の変形労働時間制に関する協定、時間外労働及び休日労働に関する協定に定めた時間を超えて、時間外労働及び休日労働をさせた。 この件について、令和8年1月9日、大宮簡易裁判所から同社及び同社代表取締役が労働基準法違反で略式命令(いずれも罰金30万円)を受け、その刑が確定している。 このことが、建設業法第28条第1項第3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=2142

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

Compliance context

Context needed

This is a public Japanese regulatory disclosure. The exact legal effect depends on the cited source and regulator.

Construction business law covering licensing, contractor obligations, and public-interest rules for construction work.

Review the original Japanese source and determine relevance to your counterparty-risk workflow.

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

Evidence pack

Original Kantō Regional Development Bureau announcement (Japanese)Archived source snapshot
Extracted at
2026-06-12T16:42:52.548+00:00
Evidence checked
2026-06-12T16:42:52.548+00:00
Archive captured
2026-06-12T18:30:37.899+00:00
Show audit JSON
{
  "record": {
    "id": "9c172964-923c-4b13-b1fd-096725b18bbf",
    "url": "https://regbase.jp/en/enforcement/kensetsu-gyoho-xiao-jiu-bao-tie-jin-gong-ye-20260609",
    "company_name_original": "小久保鉄筋工業株式会社",
    "company_name_registry": "小久保鉄筋工業株式会社",
    "corporate_number": "2030001085408",
    "law": {
      "ja": "建設業法",
      "en": "Construction Business Act"
    },
    "action_type": {
      "ja": "営業停止",
      "en": "Business Suspension"
    },
    "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_verified",
    "method_label": "source_corporate_number_nta_verified",
    "notes": "Corporate Number 2030001085408 was present in the public disclosure and verified against the NTA full-download index (小久保鉄筋工業株式会社)."
  },
  "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-xiao-jiu-bao-tie-jin-gong-ye-20260609",
    "officialSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=2142",
    "archiveUrl": "https://kiroku.today/view/547de2bad9b9i21z",
    "archiveCapturedAt": "2026-06-12T18:30:37.899+00:00",
    "extractedAt": "2026-06-12T16:42:52.548+00:00",
    "translatedAt": "2026-07-06T06:03:06.387+00:00",
    "evidenceCheckedAt": "2026-06-12T16:42:52.548+00:00",
    "generatedAt": "2026-07-11T05:23:31.092Z"
  },
  "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.

Company info

English name
小久保鉄筋工業株式会社 Japanese original
Japanese name
小久保鉄筋工業株式会社
Corporate Number
2030001085408
Registered address
東京都港区芝3丁目43番5号三田加藤ビル3階
See company profile →

About this recordAggregated and translated from public Japanese government disclosures. The English text is for reference only — authoritative content is the linked Japanese source.