Enforcement record

Business Suspension against 岡本建設工業株式会社

岡本建設工業株式会社 (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.

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Construction Business ActOsaka PrefectureConfirmed entity match13 June 2024

Action type

Business Suspension

Law

Construction Business Act

Authority

Osaka Prefecture

Action date

13 June 2024

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-GA-202607241405
Generated at: 24 July 2026 at 23:05
Record URL: https://regbase.jp/en/enforcement/kensetsu-gyoho-gang-ben-jian-she-gong-ye-20240613

1. Review Summary

Target entity	岡本建設工業株式会社	Corporate Number	9120001027220
Enforcement record	1 record	Other confirmed records for this company	0 records
Action date	13 June 2024	Authority	Osaka Prefecture
Law	Construction Business Act	Action type	Business Suspension
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. Target Entity

English display name	岡本建設工業株式会社
Original Japanese name	岡本建設工業株式会社
English-name source	Japanese original
Corporate Number	9120001027220
Company status	Active
Representative	山下亮
Registered address	大阪府大阪市大正区南恩加島５丁目８番１２号
Industry / capital	Industry: 建設業 / Capital: -

3. Enforcement Record

Target name in disclosure	岡本建設工業株式会社
Authority	Osaka Prefecture (大阪府)
Law / action type	Construction Business Act / Business Suspension
Action / announcement date	Action: 13 June 2024 / Announcement: 25 April 2026
English summary	The construction company participated in a general competitive bidding process for a construction contract ordered by Osaka Prefecture in Osaka City. They applied for bids from Tamai Corporation, the construction company, and Yutaka Corporation using the same IP address. Subsequently, Tamai Corporation and Yutaka Corporation submitted bids from the same IP address. The bid documents for these four companies, including the construction company and Renuve Daito Corporation, contained identical direct construction costs in their cost breakdown sheets. This violated Article 3, Paragraph 3 of the Osaka Prefecture Electronic Bidding Rules, which states that bidders must not disclose bid prices or cost breakdown details to other bidders before the winner is decided. These actions constituted misconduct regarding the bidding and contract procedures for public works.
Original Japanese text	当該建設業者は、大阪市内の大阪府発注の建設工事の請負契約に係る一般競争入札において、同一のIPアドレスより株式会社タマイ、当該建設業者及び株式会社ユタカが入札参加申請を行った上、同一のIPアドレスより株式会社タマイ及び株式会社ユタカが入札を行い、当該建設業者及びリノヴェ大都株式会社を含めこれら４社の入札書に添付された工事費内訳書記載の直接工事費を全く同一とし、大阪府建設工事電子入札心得第３条第３項の「入札参加者は、落札者の決定前に、他の入札参加者に対して入札価格又は工事費内訳書の内容を開示してはならない。」との規定に違反するなど、公共工事の入札及び契約手続について不正行為等を行った。
Official source	https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=1026
Source archive	https://kiroku.today/a/f0b7804b9bi775b5
Extraction / evidence timestamps	Extracted: 17 July 2026 at 17:42 / Evidence checked: 17 July 2026 at 17:42 / Archive captured: 13 July 2026 at 04:41

4. Business Location and Permit Details

Business location address	大阪府大阪市大正区南恩加島五丁目８番12号
Representative	山下亮
Permit / registration number	大阪府知事許可（般－３）第10612号
Permitted business types	Civil engineering works, Building works, Carpentry works, Roof works, Tile, brick, and block works, Interior finishing works
Legal articles	建設業法第28条第３項
Cause of action	当該建設業者は、大阪市内の大阪府発注の建設工事の請負契約に係る一般競争入札において、同一のIPアドレスより株式会社タマイ、当該建設業者及び株式会社ユタカが入札参加申請を行った上、同一のIPアドレスより株式会社タマイ及び株式会社ユタカが入札を行い、当該建設業者及びリノヴェ大都株式会社を含めこれら４社の入札書に添付された工事費内訳書記載の直接工事費を全く同一とし、大阪府建設工事電子入札心得第３条第３項の「入札参加者は、落札者の決定前に、他の入札参加者に対して入札価格又は工事費内訳書の内容を開示してはならない。」との規定に違反するなど、公共工事の入札及び契約手続について不正行為等を行った。
Overview page	https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=1026

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.

Current page: Enforcement record

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Free report

Save a public-record evidence report for 岡本建設工業株式会社

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Preserved evidence by Kiroku

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Open preserved source and evidence pack

For developers: JSON integration details

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/api/v1/enforcements?corporate_number=9120001027220&limit=10

Open JSON Specs

Action summary

Company: 岡本建設工業株式会社Japanese original
Original: 岡本建設工業株式会社
Corporate Number: 9120001027220
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: 13 June 2024
Issuing authority: Osaka Prefecture
大阪府
Industry context: 建設業者

Violation

Machine-translated summary — verify against original

The construction company participated in a general competitive bidding process for a construction contract ordered by Osaka Prefecture in Osaka City. They applied for bids from Tamai Corporation, the construction company, and Yutaka Corporation using the same IP address. Subsequently, Tamai Corporation and Yutaka Corporation submitted bids from the same IP address. The bid documents for these four companies, including the construction company and Renuve Daito Corporation, contained identical direct construction costs in their cost breakdown sheets. This violated Article 3, Paragraph 3 of the Osaka Prefecture Electronic Bidding Rules, which states that bidders must not disclose bid prices or cost breakdown details to other bidders before the winner is decided. These actions constituted misconduct regarding the bidding and contract procedures for public works.

Show original Japanese text

当該建設業者は、大阪市内の大阪府発注の建設工事の請負契約に係る一般競争入札において、同一のIPアドレスより株式会社タマイ、当該建設業者及び株式会社ユタカが入札参加申請を行った上、同一のIPアドレスより株式会社タマイ及び株式会社ユタカが入札を行い、当該建設業者及びリノヴェ大都株式会社を含めこれら４社の入札書に添付された工事費内訳書記載の直接工事費を全く同一とし、大阪府建設工事電子入札心得第３条第３項の「入札参加者は、落札者の決定前に、他の入札参加者に対して入札価格又は工事費内訳書の内容を開示してはならない。」との規定に違反するなど、公共工事の入札及び契約手続について不正行為等を行った。

Business location and permit details

Business location address: 大阪府大阪市大正区南恩加島五丁目８番12号
Representative: 山下亮
Permit / registration number: 大阪府知事許可（般－３）第10612号
Permitted business types: Civil engineering works, Building works, Carpentry works, Roof works, Tile, brick, and block works, Interior finishing works
Legal articles: 建設業法第28条第３項
Cause of action: 当該建設業者は、大阪市内の大阪府発注の建設工事の請負契約に係る一般競争入札において、同一のIPアドレスより株式会社タマイ、当該建設業者及び株式会社ユタカが入札参加申請を行った上、同一のIPアドレスより株式会社タマイ及び株式会社ユタカが入札を行い、当該建設業者及びリノヴェ大都株式会社を含めこれら４社の入札書に添付された工事費内訳書記載の直接工事費を全く同一とし、大阪府建設工事電子入札心得第３条第３項の「入札参加者は、落札者の決定前に、他の入札参加者に対して入札価格又は工事費内訳書の内容を開示してはならない。」との規定に違反するなど、公共工事の入札及び契約手続について不正行為等を行った。
Overview page: https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=1026

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 Osaka Prefecture source (Japanese)Open preserved source and evidence pack

Extracted at: 2026-07-17T08:42:52.102+00:00
Evidence checked: 2026-07-17T08:42:52.042+00:00
Archive captured: 2026-07-12T19:41:04.699364+00:00

Show audit JSON

{
  "record": {
    "id": "8f5e2e7e-359c-4921-94a0-89cf4a571836",
    "url": "https://regbase.jp/en/enforcement/kensetsu-gyoho-gang-ben-jian-she-gong-ye-20240613",
    "company_name_original": "岡本建設工業株式会社",
    "company_name_registry": "岡本建設工業株式会社",
    "corporate_number": "9120001027220",
    "law": {
      "ja": "建設業法",
      "en": "Construction Business Act"
    },
    "action_type": {
      "ja": "営業停止",
      "en": "Business Suspension"
    },
    "authority": {
      "ja": "大阪府",
      "en": "Osaka 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-gang-ben-jian-she-gong-ye-20240613",
    "officialSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=1026",
    "officialDocumentUrl": null,
    "archiveUrl": "https://kiroku.today/a/f0b7804b9bi775b5",
    "archivedSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=kensetugyousya&EID=search&no=1026",
    "archiveCapturedAt": "2026-07-12T19:41:04.699364+00:00",
    "extractedAt": "2026-07-17T08:42:52.102+00:00",
    "translatedAt": "2026-05-01T08:05:54.444+00:00",
    "evidenceCheckedAt": "2026-07-17T08:42:52.042+00:00",
    "generatedAt": "2026-07-24T14:05:13.509Z"
  },
  "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: 岡本建設工業株式会社 Japanese original
Japanese name: 岡本建設工業株式会社
Corporate Number: 9120001027220
Registered address: 大阪府大阪市大正区南恩加島５丁目８番１２号

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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.