Enforcement record
Suspension from Bidding disclosure naming （株）磯建
This page records one action from a Japanese government disclosure, including the published name, governing law, authority, action details, and official source.
Action type
Suspension from Bidding
Law
Suspension from Bidding Measures
Authority
Kantō Regional Development Bureau
Action date
17 October 2025
RegBase evidence report
Japanese public-record enforcement check
Saveable record of the published action, regulator source, source status, and review notes for internal compliance files.
- Report ID
- RB-EN-ENFORCEMENT-B97312C1-AD48-41A-202607131230
- Generated at
- 13 July 2026 at 21:30
- Record URL
- https://regbase.jp/en/enforcement/b97312c1-ad48-41ab-bc4e-eab78249fcb5
1. Review Summary
| Disclosure name | （株）磯建 | Corporate Number | Not stated in the disclosure |
|---|---|---|---|
| Enforcement record | 1 record | Other confirmed records for this company | Outside this report's scope |
| Action date | 17 October 2025 | Authority | Kantō Regional Development Bureau |
| Law | Suspension from Bidding Measures | Action type | Suspension from Bidding |
| Source status | Preserved public-source archive 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. Published Information
| Published name | （株）磯建 |
|---|
3. Enforcement Record
| Target name in disclosure | （株）磯建 |
|---|---|
| Authority | Kantō Regional Development Bureau (関東地方整備局) |
| Law / action type | Suspension from Bidding Measures / Suspension from Bidding |
| Action / announcement date | Action: 17 October 2025 / Announcement: 10 July 2026 |
| English summary | (株)磯建 was issued a nomination suspension by the Kanto Regional Development Bureau from October 17, 2025, to November 27, 2025, under the measures outlined in the relevant regulations. The suspension was due to violations during the R5 Ken-Ōdō Daisenkyō district improvement project, where the company conducted soil moisture content tests for embankment materials by selecting samples based on appearance, assuming lower moisture content indicated higher quality. Post-incident investigations confirmed that some embankments were constructed with softer, higher-moisture soil different from the tested samples, resulting in substandard roadbed quality. The violation was classified under the relevant measures for contractor suspension. |
| Original Japanese text | 当該業者は、北首都国道事務所発注の「Ｒ５圏央道大生郷地区改良その５工事」において、路体に使用する盛土材の含水比試験を行う際に、見た目で含水比が低く品質の良いところから試料を採取して試験を実施していた。 事案発生後、当該業者が実施した原因調査の結果、含水比試験に用いた試料とは異なる含水比の高い軟弱な土により一部の盛土がなされていたことが確認され、その結果、品質を満足しない路体となっていたことが判明した。 |
| Official source | https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=shimeiteishi&EID=search&no=143 |
| Source archive | https://kiroku.today/a/6f36df16f0ijs6e9 |
| Extraction / evidence timestamps | Extracted: 13 July 2026 at 08:38 / Evidence checked: 13 July 2026 at 08:38 / Archive captured: 13 July 2026 at 10:41 |
4. Business Location and Permit Details
| Business location address | 茨城県結城郡八千代町 |
|---|---|
| Action period | 令和7年10月17日～令和7年11月27日 |
| Overview page | https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=shimeiteishi&EID=search&no=143 |
| https://www.ktr.mlit.go.jp/kisha/kisha_02792.pdf |
5. Other Confirmed Records for This Company
This report covers the single government disclosure shown on this page.
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.
Current page: Enforcement record
This screen focuses on one disclosed action: the published name, governing law, authority, facts, source status, and review evidence.
Free report
Save the disclosure record naming （株）磯建
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Preserved evidence by Kiroku
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Action summary
- Company
- （株）磯建Japanese onlyOriginal: （株）磯建
- Governing law
- Suspension from Bidding Measures指名停止措置
- Action type
- Suspension from Bidding指名停止
- Action date
- 17 October 2025
- Issuing authority
- Kantō Regional Development Bureau関東地方整備局
- Industry context
- 公共工事指名停止
Violation
(株)磯建 was issued a nomination suspension by the Kanto Regional Development Bureau from October 17, 2025, to November 27, 2025, under the measures outlined in the relevant regulations. The suspension was due to violations during the R5 Ken-Ōdō Daisenkyō district improvement project, where the company conducted soil moisture content tests for embankment materials by selecting samples based on appearance, assuming lower moisture content indicated higher quality. Post-incident investigations confirmed that some embankments were constructed with softer, higher-moisture soil different from the tested samples, resulting in substandard roadbed quality. The violation was classified under the relevant measures for contractor suspension.
Show original Japanese text
当該業者は、北首都国道事務所発注の「Ｒ５圏央道大生郷地区改良その５工事」において、路体に使用する盛土材の含水比試験を行う際に、見た目で含水比が低く品質の良いところから試料を採取して試験を実施していた。 事案発生後、当該業者が実施した原因調査の結果、含水比試験に用いた試料とは異なる含水比の高い軟弱な土により一部の盛土がなされていたことが確認され、その結果、品質を満足しない路体となっていたことが判明した。
Business location and permit details
- Business location address
- 茨城県結城郡八千代町
- Action period
- 令和7年10月17日～令和7年11月27日
- Overview page
- https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=shimeiteishi&EID=search&no=143
- https://www.ktr.mlit.go.jp/kisha/kisha_02792.pdf
These fields are extracted from the original Japanese disclosure or linked overview pages when available.
Compliance context
Medium-highA public-sector authority suspended the company from bidding for covered public contracts.
Japanese regulatory disclosure under Suspension from Bidding Measures.
Verify the issuing authority, suspension period, and whether the reason affects your procurement risk assessment.
This context is an operational aid for review workflows, not a credit opinion or legal conclusion.
Evidence pack
- Extracted at
- 2026-07-12T23:38:03.59+00:00
- Evidence checked
- 2026-07-12T23:38:03.589+00:00
- Archive captured
- 2026-07-13T01:41:27.408732+00:00
Show audit JSON
{
"record": {
"id": "b97312c1-ad48-41ab-bc4e-eab78249fcb5",
"url": "https://regbase.jp/en/enforcement/b97312c1-ad48-41ab-bc4e-eab78249fcb5",
"company_name_original": "（株）磯建",
"company_name_registry": null,
"corporate_number": null,
"law": {
"ja": "指名停止措置",
"en": "Suspension from Bidding Measures"
},
"action_type": {
"ja": "指名停止",
"en": "Suspension from Bidding"
},
"authority": {
"ja": "関東地方整備局",
"en": "Kantō Regional Development Bureau"
}
},
"entity_match": {
"status": "unresolved",
"confidence": 0,
"method": "registry_attempt_deferred",
"method_label": "registry_attempt_deferred",
"notes": "法人台帳の候補集合を完全に確認できなかったため、再照合が必要です。"
},
"review": {
"status": "needs_review",
"label": "Needs review"
},
"compliance_context": {
"severity": "Medium-high",
"actionMeaning": "A public-sector authority suspended the company from bidding for covered public contracts.",
"practicalNote": "Verify the issuing authority, suspension period, and whether the reason affects your procurement risk assessment.",
"lawContext": "Japanese regulatory disclosure under Suspension from Bidding Measures."
},
"evidence": {
"recordUrl": "https://regbase.jp/en/enforcement/b97312c1-ad48-41ab-bc4e-eab78249fcb5",
"officialSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=shimeiteishi&EID=search&no=143",
"officialDocumentUrl": "https://www.ktr.mlit.go.jp/kisha/kisha_02792.pdf",
"archiveUrl": "https://kiroku.today/a/6f36df16f0ijs6e9",
"archivedSourceUrl": "https://www.ktr.mlit.go.jp/kisha/kisha_02792.pdf",
"archiveCapturedAt": "2026-07-13T01:41:27.408732+00:00",
"extractedAt": "2026-07-12T23:38:03.59+00:00",
"translatedAt": "2026-07-10T10:10:46.462+00:00",
"evidenceCheckedAt": "2026-07-12T23:38:03.589+00:00",
"generatedAt": "2026-07-13T12:30:31.396Z"
},
"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)About this recordAggregated and translated from public Japanese government disclosures. The English text is for reference only — authoritative content is the linked Japanese source.