ducut91/korean-constitutional-court-decisions

📚 Korean Constitutional Court Decisions Dataset

This dataset contains structured decisions from the Constitutional Court of Korea, crawled from official government sources. The dataset is intended for use in legal NLP research, constitutional law analysis, and the development of AI models that require authentic Korean legal data.

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📦 Dataset Summary

• Total Entries: 35,007
• Language: Korean (ko)
• Fields: 15 columns with English column names
• Use Cases: LLM training, legal summarization, retrieval systems, constitutional law research
• Source: open.law.go.kr
• Contact: ducut91@gmail.com
• License: This dataset is based on public legal data provided by the National Law Information Center (law.go.kr) and is freely available for anyone to use. You may use, modify, and redistribute the data for research, commercial, or educational purposes without restriction.

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🧾 Column Descriptions

Column Name	Description
case_id	Unique identifier assigned to each decision
decision_date	Final decision date (format: YYYY.MM.DD)
case_number	Official case number (e.g., 2022헌마1312)
case_name	Title or subject of the case
case_detail_link	URL to the full case details on the government website
summary	Summary of the decision (if available)
case_type	Type of case (e.g., 헌마 = constitutional complaint, 헌바 = constitutional review)
case_type_code	Numeric code corresponding to the case type
judged_article	Legal provisions under constitutional review
court_division_code	Code for the court division that handled the case
full_text	Full decision text (in Korean)
reference_article	Referenced laws and articles
reference_case	Cited precedents
issues	Legal issues discussed in the decision
search_result_no	Index from the search result (internal use, optional)

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📊 Missing Values Overview

Some columns contain missing values, especially those related to legal reasoning or references:

Column Name	Non-null Count	Null Count
summary	6,329	28,678
case_type	34,241	766
judged_article	4,739	30,268
full_text	29,730	5,277
reference_article	5,574	29,433
reference_case	5,336	29,671
issues	6,343	28,664

Essential metadata such as case_id, case_number, case_name, and decision_date is available for nearly all entries.

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📝 Sample Entry

{
  "case_id": "177507",
  "decision_date": "2022.09.20",
  "case_number": "2022헌마1312",
  "case_name": "Constitutional Complaint Regarding Non-Transmission of 112 Emergency Message",
  "case_detail_link": "https://law.go.kr/DRF/lawService.do?OC=...",
  "summary": null,
  "case_type": "헌마",
  "case_type_code": 430105.0,
  "judged_article": null,
  "court_division_code": 430202.0,
  "full_text": "사 건 2022헌마1312 112신고 결과 메세지 미전송 위헌확인\n청구인...",
  "reference_article": null,
  "reference_case": null,
  "issues": null
}

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💡 Recommended Use Cases

• 🧠 Fine-tune Korean LLMs on real-world legal data
• ⚖️ Build legal Q&A or legal summarization tools
• 🏛️ Conduct empirical research on Korean constitutional decisions
• 🔍 Train legal text classifiers or retrieval models
• 🌐 Benchmark multilingual legal NLP models using Korean constitutional law

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📜 License

This dataset is based on open public data provided by the South Korean government. There is no copyright restriction, and it can be freely used, shared, and redistributed for any purpose, including research, education, and commercial applications.

This complies with the Korean government's policy on public data, which allows open use of government publications.

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🎯 Why We Open-Sourced This We believe that global large language models (LLMs) should better understand and reflect the legal system of South Korea, just as they do for other major jurisdictions.

By releasing this dataset publicly, we hope to:

Promote inclusion of Korean law in multilingual legal AI systems Encourage international research in Korean legal language processing Lower the barrier to entry for developers working on Korean legal services 🇰🇷 A legally informed model is a better model — for everyone.

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📎 Source

• 🔗 Open Government Law Information Portal (open.law.go.kr)