Odel
Japan Law Search

Japan Law Search

@easakuraTypeScriptMITUpdated 1mo ago

Full-text search of all current Japanese laws (official e-Gov data), down to exact article text.

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Server endpointStreamable HTTPNo authProbed
https://horei-mcp.easakura.workers.dev/mcp

This is the third-party server itself — Odel doesn't run it. Hitting this URL directly talks straight to the upstream server with no auth or proxying. Connect through Odel to front it with managed auth.

Japan Law Search MCP — 日本の法令検索

Give your AI agent authoritative access to all ~10,000 Japanese laws and regulations.

This MCP server searches and retrieves the full text of current Japanese legislation — acts, cabinet orders, and ministerial ordinances — from the official e-Gov Laws API (Government of Japan). Built for legal-tech, compliance, HR, and contract-review AI agents working with Japanese law.

Why this server?

Japanese statutes are published as deeply nested XML with kanji numerals, era-based dates, and no convenient full-text API surface for LLMs. This server turns that into three clean, token-efficient tools.

Tools

search_laws

Full-text search across the body text of every current law (or search by law title). Returns matched snippets, law categories, promulgation dates, and official links.

get_law_structure

Table of contents for any law: chapters, sections, and article headings. Long statutes (e.g. the Civil Code with 1,000+ articles) are automatically compressed to chapter level to save tokens.

get_law_article

Retrieve the exact text of any article. Accepts flexible references — 3, 第3条, 第三条の二, 3の2 — and normalizes kanji numerals automatically. Output preserves paragraph and item numbering as clean plain text.

Example queries your agent can now answer

  • 「電子署名法で電子署名が有効とされる条件は？」→ finds Article 3 and quotes it verbatim
  • "What does the Labor Standards Act say about overtime limits? Quote the exact article."
  • 「個人情報保護法の目次を見せて、第三者提供に関する条文を特定して」

Data source & freshness

Official e-Gov Laws API v2 (Government of Japan), fetched live on every call — always the currently enforced revision, including amendments enforced this month.

Pricing

Pay per tool call. One search, one table of contents, or one article retrieval = one event. No subscription, no minimum.

日本語

日本の現行法令（約1万件）を全文検索し、条文を取得できるMCPサーバーです。巨大な法令XMLをAIが読みやすいテキストに整形し、「第三条の二」等の表記ゆらぎも自動吸収します。リーガルテック・コンプライアンス・労務系AIに最適です。

Get started

This is a hosted (remote) MCP server, available on Apify Store:

👉 https://apify.com/e-asakura/japan-law-search-mcp

The store page includes setup instructions for Claude, ChatGPT, Cursor, and any MCP-compatible client. Pay-as-you-go: $0.02 per tool call, no subscription.

Built by Edward Asakura — Japanese data infrastructure for AI agents. Part of the SEKISHO series: subsidies / laws / parliament.