API Specification

Static JSON API specification for Japan Corporate History & Strategy.
Query Japanese corporate history and strategic decision data via AI Agents / LLMs.

Disclaimer

This API (data provided by Japan Corporate History & Strategy) is compiled from publicly available information by an individual developer and includes personal views. We do not guarantee accuracy, completeness, or timeliness. The developer assumes no liability for any damages arising from the use of this API data. By accessing the API, you agree to this disclaimer. This applies to both manual access and automated access by AI Agents, bots, or crawlers.

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GEThttps://the-shashi.com/api/generated/en/companies.json

Returns a list of all companies with history summaries. Use as the entry point for listing and searching.

histories[].type

Category of the strategic decision. One of the following, or null (uncategorized).

acquisition    // Acquisition / M&A
divestiture    // Divestiture / Exit
alliance       // Joint venture / Alliance
overseas       // Overseas expansion
founding       // Founding / PMF
leadership     // Leadership change
governance     // Governance reform
shareholder    // Capital market engagement
restructuring // Restructuring
crisis         // Crisis / Turnaround

GEThttps://the-shashi.com/api/tse-en/{stock_code}.json

Returns detailed data for an individual company (English). Each history entry may include full-text decision content.

content structure

When content is an object, the strategic decision is described from three perspectives.

Field	Description
`background`	Context and circumstances leading to the decision
`decision`	The actual decision made
`result`	Outcome and subsequent impact

Each field contains a summary (1-2 sentence overview) and detail (multi-paragraph body text).

Fields other than the content structure may change without notice.

GEThttps://the-shashi.com/api/generated/performance/{stock_code}-performance.json

Returns long-term financial performance data for an individual company, including revenue, net income, and cash flows.

Fields

Field	Type	Description
`year`	number	Fiscal year
`month`	number	Fiscal month
`type`	string	"単体" (Non-consolidated) or "連結" (Consolidated)
`sales_amount`	number \| null	Revenue
`profit_amount`	number \| null	Net income
`sales_profit_ratio`	number \| null	Net profit margin (%)
`operating_cf`	number \| null	Operating cash flow
`investment_cf`	number \| null	Investing cash flow
`financial_cf`	number \| null	Financing cash flow
`employees`	number \| null	Number of employees

GEThttps://the-shashi.com/api/generated/en/site-info.json

Returns site metadata including purpose, editorial stance, content structure, and API endpoint list.

Japanese version: /api/generated/site-info.json

Key fields

Field	Description
`site`	Site name, URL, language, tech stack, author info
`purpose`	Site purpose and editorial principles
`content_structure`	Content structure per company
`api_endpoints`	Available API endpoints
`pages`	Site page structure and URLs
`editorial_stance`	Editorial stance (no evaluation, public info only, etc.)
`disclaimer`	Disclaimer