{"entity":{"edinet_code":"E31748","sec_code":"6178","name_ja":"日本郵政株式会社","name_en":"JAPAN POST HOLDINGS Co.,Ltd.","industry":"サービス業","industry_en":"Services"},"names_note":"English company names are as filed: each company's own annual report states its English name on the cover page. For a company that files no annual report, EDINET's filer registry is used instead. The as-filed Japanese name is always returned alongside.","filing":{"doc_id":"S100YE7T","filer_name":"日本郵政株式会社","filer_name_en":"JAPAN POST HOLDINGS Co.,Ltd.","period_end":"2026-03-31","filed_date":"2026-06-18","sha256":"50efe97ba6c064bbdcd6219f458bf4e46346e19dd272eb7dbc2863183ae536e6","status":"clean"},"basis":{"measurement":"carrying_amount","entity_scope":"holdco_consolidated","share_scope":"both","trust_included":"unknown","as_of":"2026-03-31","period_type":"annual","labels":{"measurement":"Balance-sheet carrying amount. Under Japanese GAAP listed equities are carried at market with the valuation difference in other comprehensive income, so carrying amount and acquisition cost diverge enormously on positions bought decades ago.","entity_scope":"Every disclosing entity in the filing, summed — the reporting company plus each group holder it names.","share_scope":"Listed and unlisted shares together.","trust_included":"The filing does not state whether retirement-benefit-trust shares are included. Never guessed — shares contributed to such a trust leave the holder's balance sheet while the settlor normally keeps the right to instruct the vote.","period_type":"From an annual securities report (有価証券報告書). The policy shareholding table appears only in the annual report."},"not_comparable":"Figures are balance-sheet CARRYING AMOUNT at fiscal year end, from the annual securities report. They are NOT comparable with the acquisition-cost or book-value-reduction figures quoted in press coverage and IR presentations, and NOT comparable with interim (half-year) figures, which this product does not hold. Always state the basis with the number, and use check_claim before setting one of our figures against a published one."},"basis_note":"The basis every yen figure on this response is on. entity_scope is read from the filing's own disclosing entities, not assumed: scale_entities and flows each carry their own entity_scope and share_scope, and a figure quoted for one entity is not the group figure.","holdings":[{"holder_table":"reporting","held_name_raw":"楽天グループ株式会社","held_name_en":"Rakuten Group, Inc.","held_sec_code":"4755","match_status":"matched","shares":131004000,"book_value_yen":94728000000,"prior_shares":131004000,"prior_book_value_yen":111523000000,"purpose_ja":"当社は楽天株式会社（2021年４月１日に楽天グループ株式会社に社名変更）の株式の取得により資本関係を構築し、両社グループは物流、モバイル、ＤＸなど様々な領域での連携を強化しております。定量的な保有効果について現時点で示すことは困難でありますが、中長期的な経済合理性や将来の見通し等を勘案し、保有の合理性があると判断したものであります。","reciprocal":"無","pct_outstanding":6.037144447819305,"pct_unavailable":null,"pct_basis_period_end":"2025-12-31","pct_share_classes":1,"pct_of_holder_equity":0.574738691020618,"pct_of_holder_assets":0.03268009437401867,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":16481925000000,"holder_total_assets_yen":289864524000000,"implausible":false,"reciprocal_held_both_ways":false,"corporate_actions":[],"note_refs":[],"share_ratio":null,"reclassified_to_pure":false},{"holder_table":"reporting","held_name_raw":"株式会社大和証券グループ本社","held_name_en":"Daiwa Securities Group Inc.","held_sec_code":"8601","match_status":"matched","shares":30000000,"book_value_yen":43800000000,"prior_shares":30000000,"prior_book_value_yen":29814000000,"purpose_ja":"当社は株式会社大和証券グループ本社との資本関係を構築するとともに、当社グループと大和証券グループとの間で資産形成分野における新たな協業の検討を進めることについて合意しており、お客さま一人ひとりのライフスタイル・ニーズに応じた新たなコンサルティングサービスの開発における協力体制の構築を進めております。具体的には、2022年５月から株式会社ゆうちょ銀行において、大和証券株式会社が提供するゆうちょファンドラップを取り扱っており、従来当社グループの顧客でなかった新たな顧客層の獲得による顧客ベースの拡大による収益拡大効果が見込まれ、当社グループの企業価値の向上、利益への貢献が期待されます。定量的な保有効果について現時点で示すことは困難でありますが、中長期的な経済合理性や将来の見通し等を勘案し、保有の合理性があると判断したものであります。","reciprocal":"無","pct_outstanding":2.1650533127202167,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.2657456577432551,"pct_of_holder_assets":0.015110507279600728,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":16481925000000,"holder_total_assets_yen":289864524000000,"implausible":false,"reciprocal_held_both_ways":false,"corporate_actions":[],"note_refs":[],"share_ratio":null,"reclassified_to_pure":false}],"holders":[{"holder_name":"総合商研株式会社","holder_name_en":"SOUGOU SHOUKEN CO.,LTD.","holder_sec_code":"7850","doc_id":"S100ZAAO","period_end":"2026-07-31","holder_table":"reporting","shares":58300,"book_value_yen":138870000,"prior_shares":58300,"prior_book_value_yen":81765000,"purpose_ja":"年賀状印刷等の取引を行っており、その関係の維持・発展を図るため、継続して保有しております。","reciprocal":"無","pct_outstanding":0.002076141103950818,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":3.984144899278912,"pct_of_holder_assets":1.8133795207334686,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":3485566000,"holder_total_assets_yen":7658077000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"エイケン工業株式会社","holder_name_en":"EIKEN INDUSTRIES CO.,LTD.","holder_sec_code":"7265","doc_id":"S100XH0G","period_end":"2025-10-31","holder_table":"reporting","shares":10000,"book_value_yen":14465000,"prior_shares":10000,"prior_book_value_yen":14175000,"purpose_ja":"余剰資金を運用する為であります。","reciprocal":"無","pct_outstanding":0.00035611339690408547,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.23886132584961728,"pct_of_holder_assets":0.1858566494665214,"holder_equity_basis":"parent_only","holder_equity_yen":6055815000,"holder_total_assets_yen":7782880000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社ＢＳＮメディアホールディングス","holder_name_en":"BSN MEDIA HOLDINGS, INC.","holder_sec_code":"9408","doc_id":"S100YHOV","period_end":"2026-03-31","holder_table":"reporting","shares":5000,"book_value_yen":8945000,"prior_shares":5000,"prior_book_value_yen":7565000,"purpose_ja":"（保有目的）放送事業における取引先であり、当該先との関係強化ならびに当社グループの事業活動の維持・強化のため（定量的保有効果）上記②ａに記載のとおり","reciprocal":"無","pct_outstanding":0.00017805669845204273,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.03193491945456371,"pct_of_holder_assets":0.02421653486049381,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":28010091000,"holder_total_assets_yen":36937572000,"implausible":false,"reciprocal_held_both_ways":false}],"reclassified":[],"reclassified_note":"As filed, from the annual report's 保有目的を変更した投資株式 table. direction=to_pure means the filer moved the holding from a policy shareholding to 純投資目的 (pure investment); the shares are not necessarily sold, and the position leaves the named policy table in the year of the change. direction=to_policy is the reverse. fy_of_change_ja is the fiscal year the filer states the change took effect, verbatim — some filers list more than one. A filing repeats these rows for several years after the change, so this is a standing disclosure, not a one-year event.","implausible_note":"A row is flagged implausible when its two filed numbers are mutually impossible — book value ÷ shares of ¥1,000,000 or more, which no listed Japanese share reaches. It is a filer tagging error (a value entered at the wrong scale, or a share count in thousands), not an extraction error: the values match the filing's XBRL exactly. Flagged rows are still returned, exactly as filed, but are excluded from the yen aggregates here and counted in excluded_positions / excluded_yen so the exclusion is visible.","notes":[],"notes_note":"The filing's own numbered footnotes to the named policy table, verbatim. The XBRL numbers them (注)1, (注)2 … and gives no link back to a row, so a note is tied to a position only where it names that issuer.","flows":[],"flows_note":"The filer's own tally, as filed, of how many issues increased or decreased during the year and the yen involved — acquisition cost for increases, sale proceeds for decreases. Read against the reclassification table this separates what was actually sold from what merely changed category. Counts are as filed and are not corrected for filer tagging errors.","no_reduction_measure":"This product holds sale proceeds (売却価額), as filed, for one fiscal year. It does NOT hold a book-value-reduction measure. The two are different measures and must never be presented as equivalent.","scale":{"policy_total_yen":146414000000,"listed_yen":138528000000,"unlisted_yen":7886000000,"listed_issues":2,"unlisted_issues":4,"equity_yen":16481925000000,"equity_basis":"jgaap_consolidated","total_assets_yen":289864524000000,"assets_basis":"jgaap_consolidated","pct_of_equity":0.8883307016625789,"pct_of_assets":0.05051118294144888,"equity_basis_label":"Consolidated net assets (Japanese GAAP)","assets_basis_label":"Consolidated net assets (Japanese GAAP)","equity_calc":"total policy shareholdings ÷ shareholders' equity × 100, both as filed in this annual securities report","assets_calc":"total policy shareholdings ÷ total assets × 100, both as filed in this annual securities report"},"scale_entities":[{"holder_table":"reporting","share_class":"listed","book_value_yen":138528000000,"issue_count":2,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","book_value_yen":3000000,"issue_count":1,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"unlisted"},{"holder_table":"largest","share_class":"unlisted","book_value_yen":7883000000,"issue_count":3,"holder_table_label":"Largest holder in the group","entity_scope":"largest_holding_company","share_scope":"unlisted"}],"scale_history":[{"year":"2021","period_end":"2021-03-31","policy_total_yen":191128000000,"equity_yen":16071067000000,"equity_basis":"jgaap_consolidated","pct_of_equity":1.1892676447680792,"pct_of_assets":0.06419332295734738},{"year":"2022","period_end":"2022-03-31","policy_total_yen":151723000000,"equity_yen":14688981000000,"equity_basis":"jgaap_consolidated","pct_of_equity":1.0329035077382154,"pct_of_assets":0.0499340161287764},{"year":"2023","period_end":"2023-03-31","policy_total_yen":103328000000,"equity_yen":15098256000000,"equity_basis":"jgaap_consolidated","pct_of_equity":0.6843704332473897,"pct_of_assets":0.034894953300155726},{"year":"2024","period_end":"2024-03-31","policy_total_yen":150119000000,"equity_yen":15738530000000,"equity_basis":"jgaap_consolidated","pct_of_equity":0.95383113924871,"pct_of_assets":0.050259274566886676},{"year":"2025","period_end":"2025-03-31","policy_total_yen":145599000000,"equity_yen":15289540000000,"equity_basis":"jgaap_consolidated","pct_of_equity":0.9522784858144849,"pct_of_assets":0.04899854283188411},{"year":"2026","period_end":"2026-03-31","policy_total_yen":146414000000,"equity_yen":16481925000000,"equity_basis":"jgaap_consolidated","pct_of_equity":0.8883307016625789,"pct_of_assets":0.05051118294144888}],"scale_note":"The policy total is Official (as filed) — the filing's own total carrying amount for the whole policy bucket, listed and unlisted, summed across the entities the filing discloses. It is a floor: holdings at group companies the filing does not name are disclosed nowhere and are not included. The percentages are calculated, not filed, and carry their formula. equity_basis names which figure the denominator is, because filers report under Japanese, IFRS or US accounting standards and an adopter of the latter two stops tagging the Japanese consolidated figure — a parent-only denominator is a different measure and is labelled as one, never silently mixed with a group figure. Percentages are null where equity or total assets is missing or not positive; missing is never shown as zero.","scale_reference":"ISS's Japan proxy voting guidelines recommend a vote against the top executive at a company that allocates 20 percent or more of its net assets to cross-shareholdings, a policy effective from February 2022. ISS counts unilateral holdings, not only mutual ones.","ownership_calc":"shares held ÷ (issuer's issued shares − treasury shares) × 100, both as filed, the denominator taken from the issuer's own annual securities report nearest the holding's fiscal year end","ownership_note":"Derived, not filed. The denominator is the issuer's own reported issued shares less treasury shares, from its annual report nearest this holding's fiscal year end on either side — pct_basis_period_end gives that date, and it can fall after the holding's date where that report is the closer one. For a single-class listed stock this equals the stake's share of market capitalisation. It is null where the issuer files no annual report we hold; where the issuer's share count moves by half or more across the window, because a split or issue makes the share base indeterminate; and where the result would exceed 100%, which is a data fault rather than a stake. It is less exact where the issuer has more than one share class (pct_share_classes > 1), because treasury shares are reported across all classes.","holder_share_calc":"this position's book value ÷ the holder's shareholders' equity (or total assets) × 100, both as filed in the holder's own annual securities report","holder_share_note":"The mirror of pct_outstanding. That sizes a stake against the ISSUER — how much of the issuer this holder owns. pct_of_holder_equity and pct_of_holder_assets size the same position against the HOLDER: how much of its own capital is committed to this one name. Calculated, not filed. Null where the holder's filing gives no usable denominator, never zero. holder_equity_basis says which accounting figure the denominator is, and a parent_only basis is not comparable with a consolidated one. A position CAN legitimately exceed 100% of equity — a holder whose book equity is smaller than one long-held stake is a real and commercially interesting case, not an error — so no ceiling is imposed. Extreme values are worth checking against the filing: where the position's own two filed numbers are mutually impossible the row is marked `implausible`, but that test catches only scale errors visible per share, so it does not catch every bad figure. The book value and share count are returned alongside so the reader can check.","action_calc":"keyword match over the filing's own stated purpose and table footnotes: 株式分割、株式併合、株式交換、株式移転、会社分割、合併、持株会社、商号変更、公開買付、上場廃止","ratio_calc":"current shares ÷ prior shares where that ratio is an exact whole number (or its exact reciprocal) — the signature of a split or a consolidation rather than a trade","history":[{"year":"2019","period_end":"2019-03-31","named_holdings":1,"book_value_yen":16870000000},{"year":"2021","period_end":"2021-03-31","named_holdings":2,"book_value_yen":186886000000},{"year":"2022","period_end":"2022-03-31","named_holdings":2,"book_value_yen":147461000000},{"year":"2023","period_end":"2023-03-31","named_holdings":2,"book_value_yen":99066000000},{"year":"2024","period_end":"2024-03-31","named_holdings":2,"book_value_yen":145857000000},{"year":"2025","period_end":"2025-03-31","named_holdings":2,"book_value_yen":141337000000},{"year":"2026","period_end":"2026-03-31","named_holdings":2,"book_value_yen":138528000000}],"history_note":"One point per annual report filed. Each year's book value is as filed; book values are fair-valued at period end, so a change reflects both trading and market moves.","provenance":{"trust":"official","note":"Figures exactly as filed in each company's 有価証券報告書 (annual securities report), EDINET. Raw filings archived with SHA-256; doc_id links to the source filing."}}