Lawsy - Making Law Easy

Lawsy is a hackathon-born Legal Search tool for Japanese statutes and regulations. This open-source repository reflects the prototype developed during the hackathon and is not a production-ready implementation. It integrates semantic search, statute databases, and authoritative web sources to generate clear, referenced reports, showing how legal research can be made more accessible and transparent.

Requirements

• uv
  • pip install uv
• OpenAI
  • OPENAI_API_KEY
• GCloud CLI
  • https://cloud.google.com/sdk/docs/install

Run

1. Install dependencies

Install Python packages

make install

2. Create .env file

Create .env file and put it in the repository root directory.

OPENAI_API_KEY=sk-...  # OpenAI API KEY
LAWSY_WEB_SEARCH_ENGINE=DuckDuckGo
LAWSY_LM=openai/gpt-4o-mini

3. Download Preprocessed Data

make lawsy-download-preprocessed-data

Run App

make lawsy-run-app

Development

Format & Lint

format:

make format

lint:

make lint

References

• 2025-03-16 行政と技術の融合へ—法令Deep ResearchツールLawsyの開発記録
• 2025-03-14第三弾：「法令」×「デジタル」ハッカソンを開催しました
• 2025-03-06 法令 Deep Research ツール Lawsy を OSS として公開しました