Kabuken MCP plugin

Kabuken is an MCP server that gives Claude and other MCP clients direct access to Japanese statutory filings on EDINET. It returns individual XBRL facts with bilingual (English/Japanese) taxonomy labels, calculation-linkbase trees, and segment breakdowns, all traceable to the filing they came from — not a flattened summary table.

Coverage, as of 2026-09-21: 99 of 99 currently-tracked TOPIX-100 constituents, 1,967 filings, fully extracted with zero missing facts on the current read path. Coverage beyond this set is broader but partial, and remediation is in progress. Kabuken has no stock prices or market data, and no history before FY2025 — earlier years appear only as comparatives inside 2025+ filings.

Signup is required. A free BASIC tier is available; see Tiers below.

Install

This plugin declares a remote MCP server in .mcp.json (https://kabuken.intellics.ai/mcp, streamable HTTP). Enable the plugin, then see SETUP.md or ask Claude "set up Kabuken" to authenticate.

Tools

16 read-only tools, grouped by purpose. None write or modify data.

Company and industry discovery

• search_companies — search Japanese listed companies by name (EN or JA, partial match)
• get_company — full company record by any identifier (entity code, ticker, name)
• list_industries — TSE industry classification taxonomy (bilingual)

Filings

• list_documents — EDINET filing list for a company, with submission dates, period coverage, and XBRL/PDF availability

Financial facts

• get_financial_facts — structured XBRL facts for a single filing, bilingual labels
• get_calculation_tree — XBRL calculation linkbase as a tree (how totals decompose into components)
• get_segment_breakdown — segment/geography/consolidation-scope dimensional data, bilingual axis and member labels
• get_company_financials — multi-period income statement, balance sheet, and cash flow, grouped by statement type

Comparison and screening

• compare_companies — side-by-side financial matrix for 2-5 companies from their latest annual securities report
• screen_companies — filter companies by financial ratio (ROE, ROA, operating margin, current ratio, debt-to-equity); no price-based screens
• get_industry_overview — mean/median/count per ratio for an industry, plus top/bottom 3 companies

Ownership and risk

• get_major_shareholders — large-shareholding report (大量保有報告書) data: holder, percentage, shares, filing date
• get_risk_context — BOJ policy-rate sensitivity and METI export-control classification for a company

AI-powered analysis

• get_document_summary — AI-generated summary of a filing
• analyze_document — free-text Q&A grounded in a specific filing

Account

• get_account_quota — caller's current daily quota usage, limit, and reset time; available to all tiers and does not itself consume quota

Tiers

Get an account and a kbk_ API key (or use OAuth) at kabuken.intellics.ai. See SETUP.md for the connection walkthrough.

Slash commands

• /kabuken:company-snapshot <company> — revenue, income, assets, equity, and risk context for one company
• /kabuken:peer-comparison <company, company, ...> — side-by-side financials for 2-5 companies
• /kabuken:segment-breakdown <company> — business/geographic segment breakdown for a filing

Attribution

EDINET content (filings, facts, dimensions) is used under Japan's Public Data License 1.0 (PDL 1.0):

Source: EDINET (https://disclosure2.edinet-fsa.go.jp/), PDL 1.0 (https://www.digital.go.jp/resources/open_data/public_data_license_v1.0). Data is processed by Kabuken, not raw unprocessed FSA data.

The EDINET Taxonomy (concept labels, calculation-linkbase relationships, dimension axis/member labels) is excluded from PDL 1.0 and separately licensed under the FSA EDINET Taxonomy Legal Statement (https://www.fsa.go.jp/search/EDINET_Taxonomy_Legal_Statement.html), which requires the notice "© Copyright 2014 Financial Services Agency, The Japanese Government" on redistribution. Tools that surface taxonomy content (get_calculation_tree, get_segment_breakdown) carry this notice.

Figures returned by screen_companies, get_industry_overview, compare_companies, and get_company_financials are calculated by Kabuken from EDINET filings, not reported directly by EDINET. Output from analyze_document is AI-generated and may contain errors; it is not investment advice.

Privacy policy

https://kabuken.intellics.ai/privacy

Documentation

https://kabuken.intellics.ai/docs

Registry manifest

server.json describes the hosted Kabuken MCP server (https://kabuken.intellics.ai/mcp) in the official MCP registry format and is published from this repo under the io.github.intellics-ai/kabuken namespace. The server's own source runs in a separate, private repository; this public repo is the registry's companion listing and the home for the plugin package documented above. Publishing runs via .github/workflows/publish-registry.yml (manual workflow_dispatch, GitHub OIDC authentication, no stored secrets).