due-diligence-jp

Kokai for Public Business Intelligence — Japan

AI-citable Japanese public business intelligence for all AI agents — 6-source Authority Chain: corporate registries (gBizINFO + 国税庁 法人番号 公表 Web-API), government subsidies (J-Grants), listed-company IR (EDINET 金融商品取引法開示書類), statutory law (e-Gov 法令検索, デジタル庁), and government procurement (官公需情報ポータル, 中小企業庁) with 士業 + investment-disclaimer boundary safety. For AI builders (Claude / Cursor / Codex / OpenAI App Server / all MCP clients), Japanese 士業 (行政書士 / 中小企業診断士 / 公認会計士 / 税理士 / 弁護士 / 司法書士), investment professionals, M&A advisors, and B2G sales / consulting teams.

This is the Japan-market equivalent of Anthropic's financial-services agent templates, focused on Japanese public canonical data sources. It is open source under Apache License 2.0 and packages Kokai Data (an AI-citable public business intelligence MCP server) as both a universal MCP server (for all AI clients) and Claude plugins + managed agents (for Anthropic ecosystem sugar).

Architecture — Universal MCP server + Anthropic Plugin sugar (2 layers)

Kokai Data follows a 2-layer architecture for AI agent ecosystem neutrality:

Layer	What	Who can use it
L1: Universal MCP server	https://mcp.kokai.ai/functions/v1/mcp-server — implements MCP spec 2025-06-18	All MCP clients: Claude Code / Claude Cowork / Claude Managed Agents / Claude.ai (connectors layer) / Cursor / Codex / OpenAI App Server / any custom MCP client. Setup via .mcp.json config (no Plugin required).
L2: Anthropic Plugin sugar (this repo)	Kokai-Data/japan-business-data — bundles Skills, slash commands, managed-agent cookbook, and auto-registers the MCP server	Anthropic ecosystem users: Claude Code (CLI + Desktop App) / Claude Cowork / Claude Managed Agents. Plugin install auto-configures everything (no manual .mcp.json editing).

Non-Claude clients (Cursor / Codex / etc.) do NOT need to install this Plugin — they connect to the MCP server directly via their own .mcp.json (see Path 4 below). The Plugin layer is purely Anthropic-ecosystem distribution sugar (auto-install / auto-update / Skills auto-invocation).

This dual approach matches Kokai's brand promise: AI agent ecosystem neutral, not tied to any single AI provider.

Naming

Brand	Kokai Data
Marketplace handle	kokai
GitHub repository	Kokai-Data/japan-business-data
Plugin (recommended install)	kokai-data
MCP server	mcp.kokai.ai
Trade sub-brand	Kokai Trade

The recommended install is the kokai-data plugin (/plugin install kokai-data@kokai) — the brand-bearing core plugin that bundles the MCP server, slash commands, and skills. The marketplace handle is kokai (brand-first); the GitHub repo stays Kokai-Data/japan-business-data.

Migration from legacy plugin name

The core plugin was renamed from japan-public-business-intelligence to kokai-data (for brand visibility in the Claude Code plugin list). If you installed the legacy plugin, please re-install:

1. Uninstall the legacy plugin japan-public-business-intelligence (or remove it in the GUI plugin list).
2. Install the new plugin: /plugin install kokai-data@kokai.

Your existing slash commands (/企業調査, /提案準備, etc.) work the same after re-install.

Disclaimer

Kokai provides signal / 確認材料 / context, not decisions. Subsidy 適格性, 申請可否, legal interpretation, 訴訟戦略, bid eligibility, tax, or professional judgments are out of scope and must be verified by a certified Japanese 士業 (registered advisor: 行政書士 / 中小企業診断士 / 公認会計士 / 税理士 / 弁護士 / 司法書士). Never fictionalize company, subsidy, statute, or procurement facts — use only Kokai tool/prompt outputs and cited public sources.

Who is this for

This Plugin is for: