Japan Company Info Bridge MCP server

Japan Company Info — MCP Server (Free Edition)

The only 100% OFFLINE, all-in-one Japanese Corporate Due Diligence MCP. Integrates 4 official government sources: NTA 13-digit Corporate IDs, EDINET XBRL financials (US GAAP / IFRS mapped), e-Stat industry benchmarks, and gBizINFO certifications. Zero cloud leakage. Zero Docker.

Query EDINET statutory filings (5-year XBRL), National Tax Agency 13-digit corporate numbers, major shareholders, and gBizINFO certifications/subsidies — with a built-in J-GAAP / US GAAP / IFRS mapping dictionary that correctly distinguishes 営業利益 (Operating Income) from 経常利益 (Ordinary Income, a J-GAAP-only concept).

This package is the Free edition: 192 large-cap blue-chip listed companies (EDINET-listed, Nikkei 225 sample). The full dataset — 3,193+ listed companies with complete XBRL financials, major shareholders, gBizINFO details, and 財務省 法人企業統計調査 industry benchmarks — is available as a one-time purchase at mcporb.store.

Use cases: cross-border equity analysis, KYB / due-diligence entity verification,

M&A target screening, and reading Japanese filings in English without mistranslating

営業利益 (Operating Income) vs 経常利益 (Ordinary Income, a J-GAAP-only concept).

How it works

The server bundles the mcporb-runtime binary and a pre-indexed Orb (BM25 + trigram + optional dense-vector retrieval). Retrieval runs on your machine. On first launch the runtime downloads its query-embedding model (~220MB) in the background to enable the semantic vector method; until that finishes — and forever after, offline — the bm25, trigram, and auto methods work without any network access. Your queries are not sent to a third-party API by this server.

It exposes five domain tools that normalize your request into a precise query, plus the generic search_knowledge tool as a fallback for open-ended questions:

financials (P/L, balance sheet, cash flow) and executive compensation, with accounting concepts mapped across J-GAAP / US GAAP / IFRS.

• edinetfinancialsusgaap(companyname, metric?, fiscalyear?) — EDINET statutory

corporate number, registered address, legal status, and gBizINFO certifications / subsidies.

• japancorporateregistry(companyname, infotype?) — 13-digit National Tax Agency

structure from the 大株主 section of 有価証券報告書.

• japanshareholders(companyname, topn?)** — major shareholders and ownership

ordinary margin, equity ratio, ROE) from 財務省 法人企業統計調査 via e-Stat.

• japanindustrybenchmarks(industry, metric?) — sector benchmarks (operating margin,

discover a company when the target is unknown or ambiguous.

• japancompanysearch(query, method?, topk?)** — keyword / fuzzy / semantic search to

method ∈ auto (default) · bm25 (exact keyword) · trigram (fuzzy / identifier) · vector (semantic) · hybrid (RRF fusion).

• searchknowledge(query, method?, topk?) — raw knowledge-base search (fallback).

The five domain tools resolve into search_knowledge internally, so retrieval and the .orb capsule stay completely generic.

Quick start

Claude Desktop

Add to claudedesktopconfig.json:

{
  "mcpServers": {
    "japan-company-info": {
      "command": "npx",
      "args": ["-y", "japan-company-info-mcp-bridge"]
    }
  }
}

(Before the package is published to npm, use the GitHub form: "args": ["-y", "github:dqj1998/japan-company-info-mcp-bridge"].)

Cursor

Add the same server under Settings → MCP → Add Server (command npx, args as above).

Local (from a clone)

npx .

Platform support

Bundled runtime binaries in bin/ (no external system libraries required — run on minimal/headless images):

Shortened. The full README is on GitHub.