Enforcement record
Business Suspension against 小久保鉄筋工業株式会社
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 profileAction type
Business Suspension
Law
Construction Business Act
Authority
Kantō Regional Development Bureau
Action date
9 June 2026
RegBase evidence report
Japanese public-record enforcement check
Saveable record of the confirmed target entity, regulator disclosure, source status, and review notes for internal compliance files.
- Report ID
- RB-EN-ENFORCEMENT-KENSETSU-GYOHO-XI-202607110523
- Generated at
- 11 July 2026 at 14:23
- Record URL
- https://regbase.jp/en/enforcement/kensetsu-gyoho-xiao-jiu-bao-tie-jin-gong-ye-20260609
1. Review Summary
| Target entity | 小久保鉄筋工業株式会社 | Corporate Number | 2030001085408 |
|---|---|---|---|
| Enforcement record | 1 record | Other confirmed records for this company | 0 records |
| Action date | 9 June 2026 | Authority | Kantō Regional Development Bureau |
| Law | Construction Business Act | Action type | Business Suspension |
| Source status | Original-source archive or viewer URL recorded | ||
This report summarizes public Japanese government disclosure data held by RegBase. It is not a credit score, sanctions conclusion, legal opinion, or adverse-media determination. Confirm important decisions against the linked official Japanese source.
2. Target Entity
| English display name | 小久保鉄筋工業株式会社 |
|---|---|
| Original Japanese name | 小久保鉄筋工業株式会社 |
| English-name source | Japanese original |
| Corporate Number | 2030001085408 |
| Company status | Active |
| Representative | Not recorded |
| Registered address | 東京都港区芝3丁目43番5号三田加藤ビル3階 |
| Industry / capital | Industry: Not recorded / Capital: - |
3. Enforcement Record
| Target name in disclosure | 小久保鉄筋工業株式会社 |
|---|---|
| Authority | Kantō Regional Development Bureau (関東地方整備局) |
| Law / action type | Construction Business Act / Business Suspension |
| Action / announcement date | Action: 9 June 2026 / Announcement: 12 June 2026 |
| English summary | 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. |
| 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。 |
| Official source | https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=2142 |
| Source archive | https://kiroku.today/a/547de2bad9b9i21z |
| Extraction / evidence timestamps | Extracted: 13 June 2026 at 01:42 / Evidence checked: 13 June 2026 at 01:42 / Archive captured: 13 June 2026 at 03:30 |
4. 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 |
5. Other Confirmed Records for This Company
No other confirmed enforcement records linked to this company are shown within the current RegBase coverage.
Reviewer Notes
| Reviewer | Team / company | ||
|---|---|---|---|
| Review purpose | |||
| Additional notes | |||
- □ Official source URL or archived source was checked.
- □ Corporate Number, address, or other identifiers were reviewed to avoid confusing similarly named entities.
- □ This document is understood as a public-record evidence file, not a credit decision or legal opinion.
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Action summary
- Company
- 小久保鉄筋工業株式会社Japanese originalOriginal: 小久保鉄筋工業株式会社Corporate Number: 2030001085408
- Entity match
- Confirmed entity match100/100Machine checkedsource_corporate_number_nta_verifiedCorporate 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
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 neededThis 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
- 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.
Language
日本語版を見る (Japanese)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
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About this recordAggregated and translated from public Japanese government disclosures. The English text is for reference only — authoritative content is the linked Japanese source.