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Japan Law Search

Official registry Search and web

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

Source code

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http japan-law-search 'https://horei-mcp.easakura.workers.dev/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "japan-law-search": {
            "type": "http",
            "url": "https://horei-mcp.easakura.workers.dev/mcp"
        }
    }
}
Remote (sse)
Claude Code 
claude mcp add --transport sse japan-law-search 'https://horei-mcp.easakura.workers.dev/sse'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "japan-law-search": {
            "type": "sse",
            "url": "https://horei-mcp.easakura.workers.dev/sse"
        }
    }
}

Frequently asked questions

What is Japan Law Search?

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

How do I install Japan Law Search?

It runs as a remote server. In Claude Code: claude mcp add --transport http japan-law-search 'https://horei-mcp.easakura.workers.dev/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Japan Law Search need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Japan Law Search open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains Japan Law Search?

It is published by easakura. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.