GanieZ/japan-keiretsu-intelligence-mcp

**An AI-native, citable Japanese public business intelligence system combining three government authority chains into a single Claude plugin, MCP server, and responsive web dashboard.** Built for financial analysts, due diligence teams, and AI researchers who need verifiable Japanese company data without the overhead of manual scraping.
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📥 Download & Installation
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🪪 Overview: Why This Exists
Japan's public business data is fragmented across three incompatible government databases, each with its own API, authentication, and data quality issues. The **Japan Business Intelligence Suite** solves this by creating an **Authority Chain** that cross-references records from:
1. **gBizINFO** (経済産業省) — Corporate registry, financial statements, and subsidiary data
2. **J-Grants** (内閣府) — Government grant and subsidy recipients
3. **国税庁 法人番号** — Tax office corporate number database
This triangulation creates an **auditable, AI-citable source of truth** for Japanese company intelligence — meaning an AI assistant (Claude, GPT-4) can reference the original government source for every fact it outputs.
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✨ Key Features
Core Intelligence Engine
- **3-Source Authority Chain**: Every company profile is verified against all three government databases, with conflict detection and resolution
- **Grant-Financial Cross-Reference**: Automatically links J-Grants awards to gBizINFO financial statements to detect anomalies (e.g., grants awarded to shell companies)
- **Corporate Number (法人番号) Resolution**: 13-digit corporate number lookup with automatic name-kana translation and address normalization
AI Integration Layer
- **Claude Plugin**: Native MCP (Model Context Protocol) server enabling Claude to query Japanese business data in real-time
- **OpenAI Function Calling**: Compatible with OpenAI's function-calling API for GPT-4 and GPT-4-turbo
- **Citable Responses**: Every data point includes the source URL and timestamp from the original government database
Developer Experience
- **RESTful API**: Full CRUD operations on company profiles, grants, and corporate numbers
- **WebSocket Event Stream**: Real-time updates for grant award tracking and company status changes
- **CLI Tool**: kabushiki-analyze command for terminal-based queries
User Interface
- **Responsive Dashboard**: Built with React + Tailwind, mobile-first design
- **Multi-language Support**: Japanese, English, and Chinese interfaces with automatic detection
- **24/7 Data Refresh**: Background workers re-fetch government databases daily
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🧭 Architecture Diagram
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⚙️ Configuration
Environment Variables
| Variable | Required | Description |
|----------|----------|-------------|
| GBIZINFORM_API_KEY | Yes | gBizINFO API key (申請制) |
| JGRANTS_API_KEY | Yes | J-Grants API key for subsidy data |
| TAX_OFFICE_ENDPOINT | Yes | 国税庁 corporate number API endpoint |
| OPENAI_API_KEY | Optional | For GPT-4 function calling |
| ANTHROPIC_API_KEY | Optional | For Claude plugin integration |
| REDIS_URL | No | Caching layer (default: localhost) |
| DATABASE_URL | No | PostgreSQL connection string |
Example Profile Configuration
Example Console Invocation
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📊 Emoji OS Compatibility Table
| OS | Support Status | Notes |
|:--|:--------------|:------|
| 🪟 Windows 11 | ✅ Full Support | Native WSL2 integration |