Enforcement record

Administrative Guidance disclosure naming 土佐くろしお鉄道株式会社

土佐くろしお鉄道株式会社 (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 disclosure9 June 2023

Action type

Administrative Guidance

Law

Railway Business Act

Authority

Action date

9 June 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, 03:33 AM JST

“Confirmed” means that RegBase matched this record to the cited public disclosure or entity under the stated checks. It does not verify the truth of the disclosure or guarantee the entity’s current status, creditworthiness, or any legal conclusion.

Open the official source links in the section below to review the original disclosure.

Action summary

Company: 土佐くろしお鉄道株式会社Japanese only
Original: 土佐くろしお鉄道株式会社
Governing law: Railway Business Act
鉄道事業法
Action type: Administrative Guidance
行政指導
Action date: 9 June 2023
Issuing authority
Industry context: 鉄道事業者

Violation

Machine-translated summary — verify against original

On June 2, 2023, Tosa Kuroshio Railway Co., Ltd. experienced a train derailment between Tosa-Shirahama Station and Aii River Station caused by landslides from slopes due to heavy rainfall. The incident occurred despite prior guidance to monitor weather conditions and enforce appropriate train operation restrictions during adverse weather, as outlined in the internal regulations 'Disaster Operation Regulation Procedures.' The derailment happened after the train had completed its last run, and no injuries occurred, but the incident posed a risk of injury if it had happened during passenger boarding. The cause is under investigation by the Transportation Safety Board. It was found that the rain gauge alarm system monitoring failed because staff responsible for monitoring was away from the control room, and the train continued at normal speed near the site despite the rain gauge indicating a stop condition. The bureau has warned the company to review and strengthen operational regulations, implement permanent slope countermeasures, and report promptly on measures taken.

Show original Japanese text

鉄道の輸送の安全の確保については、機会あるごとに注意喚起してきたところであり、令和5年6月1日付事務連絡「梅雨前線による大雨及び台風第２号に備えた安全輸送の確保について」にて、沿線の降雨状況の把握に努め、気象状況等を適確に判断しつつ、施設等への被害が予想される場合には、適切に運転規制を行うなど事前の対応に万全を期すよう指導したところであるが、6月2日中村線土佐白浜駅から有井川駅間において、斜面から流入した土砂に列車が乗り上げる列車脱線事故を発生させたことは誠に遺憾である。本件事故については、現在、運輸安全委員会において原因調査中であるが、土砂が流入し、脱線事故が発生した現場は、災害時の運転規制手続きを定める社内規程「災害時運転規制手続」において、降雨時の斜面崩壊に対し設定された規制区間内に位置しているが、当該社内規程に基づく雨量計警報装置の監視が適切に行われなかったことが要因のひとつであると考えられる。雨量計警報装置の監視が適切に行えなかったのは、当該列車を最終列車とし、以後の運転を中止するための手配に追われ、雨量計警報装置への注意を欠いていたこと、また運転規制を要請する施設車両区長が、打合せのため雨量計警報装置が設置された執務室を離れていため、結果的に当該区間を規制する雨量計の雨量が運転中止の値に達していたにも関わらず、当該列車は、現場付近を通常の速度で走行し脱線している。本件事故は、幸い乗客が全て下車した後に発生したが、一歩間違えば多くの負傷者が生ずる恐れのある事態であった。現場最徐行等の緊急対策を講じた上で運転を再開するとしているところであるが、多雨期を迎えていることを踏まえ、引き続き、万全の対応を継続するとともに、同種事故防止のため、背後要因を含む原因を究明のうえ、適切な運転規制を行えるよう運転規制に係る規程や実施体制の見直しを行うとともに、現場斜面の恒久対策の検討を速やかに行うよう厳重に警告する。なお、講じた措置については、文書により速やかに報告されたい。【四国運輸局】

Business location and permit details

Business location address: 高知県高知市
Legal articles: 鉄道事業法
Overview page: https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=tetudou&EID=search&no=90

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: 2026-05-14T21:28:37.358+00:00
Evidence checked: 2026-05-14T21:28:37.358+00:00
Archive captured: 2026-05-16T18:33:23.144292+00:00

Show audit JSON

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    "url": "https://regbase.jp/en/enforcement/tetsudo-jigyoho-tu-zuo-kurosiotie-dao-20230609",
    "company_name_original": "土佐くろしお鉄道株式会社",
    "company_name_registry": null,
    "corporate_number": null,
    "law": {
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      "en": "Railway Business Act"
    },
    "action_type": {
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      "en": "Administrative Guidance"
    },
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      "ja": "",
      "en": ""
    }
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  "entity_match": {
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    "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."
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  "evidence": {
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    "officialSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=tetudou&EID=search&no=90",
    "officialDocumentUrl": null,
    "archiveUrl": "https://kiroku.today/a/26e8c11f088omqx3",
    "archivedSourceUrl": "https://www.mlit.go.jp/nega-inf/cgi-bin/search.cgi?jigyoubunya=tetudou&EID=search&no=90",
    "archiveCapturedAt": "2026-05-16T18:33:23.144292+00:00",
    "extractedAt": "2026-05-14T21:28:37.358+00:00",
    "translatedAt": "2026-07-06T06:52:59.647+00:00",
    "evidenceCheckedAt": "2026-05-14T21:28:37.358+00:00",
    "generatedAt": "2026-09-21T01:52:53.926Z"
  },
  "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.