Enforcement record

Administrative Guidance disclosure naming いすみ鉄道株式会社

いすみ鉄道株式会社 (Railway Business Act)

This page records one action from a Japanese government disclosure, including the published name, governing law, authority, action details, and official source.

Railway Business ActGovernment disclosure25 January 2023

Action type

Administrative Guidance

Law

Railway Business Act

Authority

Action date

25 January 2023

Current page: Enforcement record

This screen focuses on one disclosed action: the published name, governing law, authority, facts, source status, and review evidence.

Source verification

Public-source and preservation status

Publishing authority
Official source URL
Recorded by RegBase
Entity match
Not confirmed; shown under the published name
Kiroku preservation
Completed archive verified
Captured: May 17, 2026, 03:31 AM JST

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/api/v1/enforcements?company=%E3%81%84%E3%81%99%E3%81%BF%E9%89%84%E9%81%93%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE&limit=10
Open JSONSpecs

Action summary

Company
いすみ鉄道株式会社Japanese only
Original: いすみ鉄道株式会社
Governing law
Railway Business Act
鉄道事業法
Action type
Administrative Guidance
行政指導
Action date
25 January 2023
Issuing authority
Industry context
鉄道事業者

Violation

Machine-translated summary — verify against original

Between November 28 and 30, 2022, the Chiba Transport Bureau conducted a safety audit of Isumi Railway Co., Ltd. (corporate number 5040001075140, headquartered in Isumi District, Chiba Prefecture). The audit revealed deficiencies in track maintenance, periodic inspections, and gauge adjustment. Specifically, certain track sections exceeded the maintenance standards outlined in Article 71 of the Civil Engineering Facilities Implementation Standards, yet no maintenance plans had been formulated for these sections. Additionally, track displacement inspections of switches had not been performed since January 2021, and gauge inspections at rail joints were not conducted as required, with some exceeding the permissible gauge limits of 20mm. The bureau instructed the company to promptly carry out track repairs at the exceeded sections, complete all switch displacement inspections, and promptly assess and correct gauge issues at rail joints, including bolt replacements if necessary. The company is required to report on the corrective measures by March 24, 2023, and establish a management system to ensure regular inspections and appropriate maintenance to prevent future issues.

Show original Japanese text

令和４年１１月２８日から１１月３０日まで、貴社に対して保安監査を実施したところであるが、監査の結果、改善を要する事項が認められたことから、下記の事項について、改善措置を講ずるよう指示する。 講じた措置については、令和５年３月２４日までに報告されたい。 以下の事項の改善措置を講ずるにあたっては、発生した背後要因を含めて原因を究明した上で、再発防止のための措置を講ずること。 記 施設の保全の実施について、以下の（１）から（３）の事実を確認した。 （１）軌道の整備について、令和４年２月に実施した軌道変位検査において、同検査結果の以下の箇所では土木施設実施基準第７１条に規定する整備基準値を超過していたが、当面監視するとしてこれら箇所の整備計画が策定されておらず軌道整備が行われていなかった。 整備基準値超過箇所 ①１ｋ７９５ｍ 曲線半径７００ｍ 【軌間：＋２６.５mm】 ②１ｋ９２５ｍ 曲線半径７００ｍ 【軌間：＋２５.５mm】 ③３ｋ００５ｍ 曲線半径３００ｍ 【軌間：＋２７.３mm】 ④５ｋ６９９ｍ 曲線半径５００ｍ 【軌間：＋２５.５mm、通り： ２６.１mm、水準： ２１.０mm】 ⑤７ｋ４７０ｍ 直線 新田野駅構内【軌間：－１５.１mm】 ⑥９ｋ４２５ｍ 曲線半径３００ｍ 【軌間：＋２０．９mm、通り： ２５.２mm】 ⑦１２ｋ０３５ｍ 曲線半径６００ｍ 【軌間：＋２４．７mm、通り： ３２.６mm】 （２）線路の定期検査について、同実施基準第８３条において１年を基準期間（許容期間１月）とし、その期間内で行わなければならないことと規定されているが、線路の定期検査のうち分岐器の軌道変位検査について、令和３年１月以降行われていなかった。 （３）遊間の整正について、同実施基準第７４条においてレール継目部における遊間の適否判定は、原則として別表第１４（継目遊間図）の定めにより行うものとすると規定されているが、令和４年３月の遊間検査では、適否判定がなされていなかった。 また、同検査結果では過大遊間２１～２５mmの箇所も複数発生しているが、同実施基準第８６条には遊間量が２０mmを超える過大遊間が生じた場合は、継ぎ目ボルトの交換を含め、努めて早期に整正を実施するものと規定されているものの、その整正がなされていなかった。 よって、以下事項について改善を行うとともに、今後の施設の保全の実施については、同実施基準に基づく線路の定期検査を確実に行い、その結果に基づき軌道整備を適時適切に行える管理体制を構築すること。 （１）について、整備基準値の超過箇所の軌道整備を速やかに実施すること。 （２）について、分岐器の軌道変位検査について速やかに全数実施すること。 また、検査の結果、整備しなければならない分岐器については、同実施基準第７２条に規定する基準値内に収める整備を行うこと。 （３）について、令和４年３月に実施した同検査結果を踏まえ、レール継目部 における遊間の適否判定を速やかに行うこと。 また、過大遊間となっている箇所については努めて早期に整正を実施すること。 【関東運輸局】

Business location and permit details

Business location address
千葉県夷隅郡
Legal articles
鉄道に関する技術上の基準を定める省令
Overview page
https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=tetudou&EID=search&no=61

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

Compliance context

Low-medium

Administrative guidance or supervision was publicly disclosed by the authority.

Japanese regulatory disclosure under Railway Business Act.

Use as a monitoring signal. Confirm details before treating it as a formal sanction.

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

Open original sources and verification detailsOfficial URL, direct PDF, and Kiroku archive
Original source (Japanese)Open preserved source and evidence pack
Extracted at
2026-05-14T21:29:38.003+00:00
Evidence checked
2026-05-14T21:29:38.003+00:00
Archive captured
2026-05-16T18:31:20.115893+00:00
Show audit JSON
{
  "record": {
    "id": "ed5d9642-d583-4a2d-89f5-927d629adfd5",
    "url": "https://regbase.jp/en/enforcement/tetsudo-jigyoho-isumitie-dao-20230125",
    "company_name_original": "いすみ鉄道株式会社",
    "company_name_registry": null,
    "corporate_number": null,
    "law": {
      "ja": "鉄道事業法",
      "en": "Railway Business Act"
    },
    "action_type": {
      "ja": "行政指導",
      "en": "Administrative Guidance"
    },
    "authority": {
      "ja": "",
      "en": ""
    }
  },
  "entity_match": {
    "status": "unresolved",
    "confidence": 95,
    "method": "normalized_name_with_corporate_number",
    "method_label": "Normalized Japanese name matched to a company profile with Corporate Number",
    "notes": "Matched by normalized Japanese company name to an enriched company profile with a Corporate Number."
  },
  "review": {
    "status": "machine_reviewed",
    "label": "Machine checked"
  },
  "compliance_context": {
    "severity": "Low-medium",
    "actionMeaning": "Administrative guidance or supervision was publicly disclosed by the authority.",
    "practicalNote": "Use as a monitoring signal. Confirm details before treating it as a formal sanction.",
    "lawContext": "Japanese regulatory disclosure under Railway Business Act."
  },
  "evidence": {
    "recordUrl": "https://regbase.jp/en/enforcement/tetsudo-jigyoho-isumitie-dao-20230125",
    "officialSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=tetudou&EID=search&no=61",
    "officialDocumentUrl": null,
    "archiveUrl": "https://kiroku.today/a/4c550511d18om9xr",
    "archivedSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=tetudou&EID=search&no=61",
    "archiveCapturedAt": "2026-05-16T18:31:20.115893+00:00",
    "extractedAt": "2026-05-14T21:29:38.003+00:00",
    "translatedAt": "2026-07-06T06:52:46.654+00:00",
    "evidenceCheckedAt": "2026-05-14T21:29:38.003+00:00",
    "generatedAt": "2026-09-10T03:25:54.200Z"
  },
  "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)

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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.