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Japan Ownership serves two EDINET filings that answer different questions. Large-holding reports (大量保有報告書) are Japan’s 5% ownership filings — the closest equivalent to a US Schedule 13D/13G — filed by the holder once its stake reaches 5%, followed by change reports (変更報告書) as the stake moves. The major-shareholder table (大株主の状況) is the top-ten list printed in the company’s annual report. Choose one with kind.
Plan: Free and above · Credits: 1 per call

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What you can use Japan ownership for

Spot a new 5% holder, or an existing one building or cutting its stake, with the date the obligation arose. Read the holder’s own stated purpose to see activist intent. Follow cross-shareholding unwinds between group companies. See who sits at the top of the register each year.

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Large-holding reports (kind=large_holdings, the default)

Each row is an event with a statutory trigger date, obligation_date (報告義務発生日). The filing is made by the holder, not the company, so holder_name is often an individual, a founder’s asset-management company or a foreign manager that appears in no company table.
  • holding_ratio and prev_holding_ratio are fractions (0.0829 = 8.29%); ratio_change is the difference.
  • shares_held and shares_outstanding are the share counts behind the ratio.
  • purpose (保有目的) is the holder’s own statement of why it holds the stake — the field with no US equivalent. A holder that writes that it has no plan to make material proposals (重要提案行為等を行う予定はなく) is declaring it will not push the company; one that does not is the row to read.
  • acquisition_funds, own_funds and borrowed_funds are disclosed only on an initial report, not on a change report, so most rows leave them null by design.
  • is_amendment marks a correction to an earlier report.
One filing is usually several rows. Japanese holders file jointly (共同保有者): a typical bank or insurer filing carries three to nine rows, one per group member, and each row’s holding_ratio is that member’s own slice, not the group’s. It is the group total that crossed 5%, so sum the rows of one doc_id to get the stake that matters. filer_name is the member that submitted; holder_name is the member the row is about.A member’s slice can be negative — for example a securities arm that is net short after lending. That is real, not a parse error.min_ratio filters row by row: min_ratio=0.05 drops the smaller members of a group that together holds 20%, and drops a whole filing whose members each hold under 5%. Leave it off when the question is who crossed the threshold.
An empty answer is often correct: a company with no holder above 5% generates no filing. EDINET also keeps large-holding reports public for about five years only, so an older window is empty at the source.

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Major-shareholder table (kind=major_shareholders)

The top-ten table out of the annual report: an annual snapshot with a rank and no event date. It carries different fields — rank, holder_name, holder_address, shares_held and shareholding_ratio (a fraction), plus period_end, filed_on, doc_id and filing_url. The table also appears in half-year reports, so group rows by doc_id and use filed_on to tell the snapshots apart; period_end can be null on some reports. The top rows are usually trust-bank custodians (日本マスタートラスト信託銀行, 日本カストディ銀行) holding for someone else: a custodian is not a beneficial owner. This view returns every row that matches in one response; narrow it with date_gte / date_lte and limit.

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Neither is a transaction feed

Japan publishes no equivalent of a US Form 4. For directors’ own holdings, see the annual share counts in Japan Officers; a director’s holding company that crosses 5% does appear here, with a trigger date.

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Japan ownership coverage

Every response carries a measured coverage block with the date range loaded, companies_covered and companies_tracked. For large-holding reports the dates are the trigger dates in the filings; for the major-shareholder table they are the annual reports loaded.

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GET /v1/companies/{company}/jp/ownership

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string
required
Tokyo symbol (7203.T or 7203), five-digit EDINET security code, EDINET filer code, ADR symbol (TM), ISIN or company_id of the issuer.
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string
default:"large_holdings"
large_holdings (5% reports) or major_shareholders (the annual top-ten table).
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string
Earliest trigger date (large holdings) or period end (major shareholders), YYYY-MM-DD; date_lte sets the ceiling.
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number
Minimum stake as a fraction (0.05 = 5%). Applied per row — see the warning above.
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string
Substring of the holder’s name, Japanese or English.
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integer
default:"100"
Rows per page, between 1 and 500. Large-holding rows are newest trigger date first and page with cursor, passing back next_cursor unchanged.
See also Japan Officers for directors’ own shareholdings, Japan EDINET Disclosures for the statutory report filed when a major shareholder changes, and 13F Institutional Holdings for US-listed positions.