Japan Corporate MCP

What the yamariki-hub/japan-corporate-mcp MCP server does

The yamariki-hub/japan-corporate-mcp MCP server connects AI assistants to Japanese government data services. It supports company searches and company-level lookups through gBizINFO, including basic details, financial figures, patents, subsidies, and government procurement records. EDINET tools provide access to securities reports, while e-Stat supports searches for government statistics.

The available data is organized around eight tools:

• search_company finds companies by name through gBizINFO.
• get_company_info retrieves details such as address, capital, and employee counts.
• get_company_finance returns financial values including revenue, profit, and assets.
• get_company_patents searches patent information.
• get_company_subsidies retrieves subsidies and grants received.
• get_company_procurement looks up government procurement records.
• get_edinet_reports searches securities reports from EDINET.
• get_statistics searches government statistics through e-Stat.

How it works

The server is intended to run as a local MCP process. An MCP-compatible client starts the japan-corporate-mcp command and passes credentials through environment variables. Tool requests are then routed to the corresponding government API: gBizINFO for most corporate records, EDINET for securities reports, and e-Stat for statistical data.

At minimum, company search and company-information tools require a gBizINFO API token. EDINET requests use an EDINET subscription key, and e-Stat requests use an e-Stat application ID. These credentials come from registrations with the respective government services.

Setup and configuration

Install the package with pip install japan-corporate-mcp, then register for the APIs required by the tools you plan to use. The README identifies web registration for gBizINFO and e-Stat, and web registration with MFA for EDINET.

Configure the process in an MCP client using these variables:

• GBIZINFO_API_TOKEN for gBizINFO access.
• EDINET_SUBSCRIPTION_KEY for EDINET tools.
• ESTAT_APP_ID for e-Stat tools.

The documented client examples cover Claude Desktop and Cursor. Both launch japan-corporate-mcp directly and supply the credentials in the client configuration. Claude Code is also shown with an claude mcp add command.

Tools and capabilities

The yamariki-hub/japan-corporate-mcp MCP server is suited to research workflows that need more than a company name lookup. An assistant can combine company identification with corporate attributes, financial data, patents, subsidies, and procurement records. Separate EDINET and e-Stat tools extend the workflow to regulatory filings and broader government statistics.

Example tasks supported by the documented tools include finding companies in a Japanese region or sector, checking Toyota patent information, retrieving Sony Group company details, searching SoftBank EDINET reports, and locating statistics about Japanese manufacturing.

Limitations and notes

Each data source has its own credential requirement and coverage. A gBizINFO token is required for the core company tools; EDINET and e-Stat credentials are needed for their respective tool groups. The provided material does not specify rate limits, response formats, historical coverage, or whether every tool requires a credential before invocation. The yamariki-hub/japan-corporate-mcp MCP server should therefore be evaluated against the particular government datasets and research scope required by an application.