P16 Data Research Library · Methodology

Research Methodology: Company, Business and Segment Data

How P16 builds its Japanese company, reported business, Business Identity and financial metric dataset from source filings.

Generated: 2026-10-14

Data snapshot: 2026-08-28 · p16-v11-2026-08-28-619c9e0a7b7a
Included company records: 3,885
Filings in source database: 18,518
Business Identities: 11,182
Methodology version: P16_RESEARCH_METHODOLOGY_V1

P16 starts from company disclosures and preserves the distinction between what a filing reports and how P16 organizes it for comparison.

Company and annual filing

The fiscal-year label comes from the issuer’s annual filing. A reportable segment is counted only when a P16 segment_disclosure row is classified as reportable_segment. A single_segment_whole_company record is kept as a distinct reporting case.

Reported business and Business Identity

A reported segment is the business grouping shown in a filing. P16 Business Identity links business disclosures across years when its evidence and mapping rules support continuity. A renamed, split, merged or recast business may change the link; it is not treated as automatically identical.

Revenue, profit and change

Revenue and profit values remain tied to source period, metric, unit and evidence. This report counts distinct P16 identities on reportable-segment records and does not derive company totals or revenue shares from segment sums.

Missing and non-comparable data

No P16 row is not the same as a statement that the issuer disclosed nothing. Missing, not disclosed, unresolved and not comparable remain distinct states; blank aggregate cells are not interpreted as zero.

Snapshot and refresh process

The public figures are regenerated locally from a pinned Production-compatible serving database and a release manifest. Refreshes are manual; no paid data service or runtime model is used. Snapshot date and database hash identify the input.

Primary sources and reporting standard

Source: EDINET annual securities reports. 川崎企画, operator of Kaisha Danmen (P16), processed and aggregated these filings. These are P16-derived statistics, not statistics published by EDINET.