Build on Japan filings programmatically.

The FinancialFilings API delivers Japan's dual-channel regulatory disclosure stream - statutory reports and ad-hoc timely disclosures - through a single REST surface authenticated with one x-api-key header, the same key that works across every covered market from Frankfurt to Seoul. A Japan-only integration is a one-parameter filter (?country=JP) on the global filings endpoint; there is no separate Japan-specific endpoint, no separate API key, and no per-market billing tier. The same endpoint that delivers a Nikkei 225 Tanshin delivers a DAX annual report.

For real-time pipelines the webhook channel is the recommended path: subscribe once, receive a POST with full filing metadata within roughly 60 seconds of publication. Japan's fiscal-year concentration around the 31 March year-end produces a predictable throughput surge in May (quarterly Tanshin and results announcements) and late June (statutory annual reports), which the webhook infrastructure handles without per-subscriber rate changes. The payload shape is identical across markets - a Japanese earnings flash arrives with the same JSON envelope as a French AMF filing - so your handler processes Tokyo and Berlin without market-specific branching.

Filing bodies are available as JSON metadata, Markdown via /api/filings/{id}/markdown/, and original PDF or XBRL. Statutory reports are filed XBRL-tagged, and the platform preserves those tagged line-items where they are published - particularly useful for building J-GAAP / IFRS comparable financial databases across the TSE Prime universe without per-issuer scraping. The Markdown rendering is valuable for Japanese content where the statutory PDF renderings are structurally consistent but verbose; the processed text is substantially more compact and NLP-ready than the source document. Language metadata is exposed on every filing, enabling English-only filters for Prime issuers that publish English Tanshin summaries.

Typical API use cases for Japanese data include backfilling TOPIX and Nikkei 225 consolidated financials for quant research (covering the J-GAAP / IFRS accounting-standard split without per-issuer normalisation), triggering on ad-hoc timely disclosures - buyback authorisations, parent-subsidiary restructurings, earnings revisions - for event-driven strategies, monitoring insider-transaction disclosures, and constructing cross-border portfolios that span TSE Prime and European markets using a consistent financial data schema. Trial keys are available on request; the web product is free and publicly indexed, so coverage quality across the 3,800-company universe is verifiable before integration.