Who is buying into Japanese companies, and what they say they will do.

See the day an investor crosses a line.

Under Japan's large-shareholding rules, holders above 5% of a listed company file a report, and file again after changes the filings describe. Check the rules and the filing itself for exact thresholds and deadlines. Each filing becomes an event with a one-line English summary; the event type and summary are our own wording.

• New stakes, increases, decreases and exits below 5%
• Crossings of 10%, 20%, one third and 50%
• Filers who newly state they may make proposals to management
• Webhooks signed with HMAC, on every plan

{
  "type": "stake_increase",
  "submit_date": "2026-11-06",
  "issuer_ticker": "5820",
  "issuer_name_en": "MITSUBOSHI CO.,  LTD.",
  "filer_name_en": "Francis Capital Inc",
  "holding_ratio_pct": 39.83,
  "previous_ratio_pct": 38.63,
  "stated_may_make_proposals": false,
  "summary_en": "Francis Capital Inc raised holdings in MITSUBOSHI CO.,  LTD. (5820) to 39.83% from 38.63%.",
  "doc_id": "S100Z93N"
}

What 5% holders say they traded.

These are the trade tables inside 5% reports, as filed. Unit prices are usually stated only for off-market trades. Stock lending, custody transfers and option exercises are flagged and left out of net shares.

See this on the company page →

The web of strategic stakes, mapped.

Annual reports list each strategic shareholding with its shares, book value and purpose, and whether the other side holds shares back. 33,860 holdings are matched to tickers, so you can follow who is unwinding.

Largest sales in the latest fiscal year →

Which U.S. funds hold a Tokyo stock.

375 U.S. mutual funds and ETFs reported 1,089,974,907 Toyota shares worth $20.10bn in their latest N-PORT filings of 2026q3. Values are in U.S. dollars as filed.

One company from its filings, in one call.

One call returns a company's latest period results, indicator figures, ownership changes and an interest example on its reported debt, each with its date. It reports figures and adds no forecast or evaluation of its own.

API reference →

Toyota: latest results, 2025-11-13

For the first half of the fiscal year to 2026-03: Profit before tax ¥2.48 trillion (-9.3% YoY), Net income ¥1.77 trillion (-7.0% YoY).

Toyota: 50 bp on all debt

¥216.0bn

The debt line is our own arithmetic on reported debt, not a forecast.

Give your agent the filings.

A remote MCP server with 37 tools covers the same data as the API, with the same key. Records carry a filing ID or a link to their source, so an agent can cite what it read.

# Claude Code
claude mcp add --transport http japanstake https://japanstake.com/mcp \
  --header "Authorization: Bearer $JAPANSTAKE_KEY"

# REST
curl -H "Authorization: Bearer $JAPANSTAKE_KEY" \
  "https://japanstake.com/v1/events?type=stated_may_make_proposals&limit=5"

Setup for Claude Desktop and Cursor →

Know the limits before you build.

• No share prices, and no investment advice. Join your own source with the FIGI and, where our mapping covers it, the ticker symbols on each company record.
• No TDnet feed and no earnings releases. Results between annual reports come from half-year and quarterly securities reports on EDINET, which arrive weeks after the period ends.
• 5% filings on file start 2021-11-05, and annual reports start June 2026, though each report carries five years of headline figures.
• Most text stays in Japanese: purposes, shareholder names and quoted sentences are served as filed.

EDINET (Financial Services Agency of Japan), SEC Form N-PORT data sets, and OpenFIGI.

Sources and licences →