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Limited","holder_sec_code":"5101","doc_id":"S100XV3S","period_end":"2025-12-31","holder_table":"reporting","shares":100,"book_value_yen":0,"prior_shares":3000000,"prior_book_value_yen":4605000000,"purpose_ja":"当社の新車向けタイヤの主要取引先であり、同事業の拡大を目的とした関係の維持・強化を図るため、継続保有しております。","reciprocal":"無","pct_outstanding":2.5707986376206867e-06,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.0,"pct_of_holder_assets":0.0,"holder_equity_basis":"ifrs_consolidated_excl_nci","holder_equity_yen":1030851000000,"holder_total_assets_yen":1998360000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社電通総研","holder_name_en":"DENTSU SOKEN INC.","holder_sec_code":"4812","doc_id":"S100XRJK","period_end":"2025-12-31","holder_table":"reporting","shares":300,"book_value_yen":0,"prior_shares":300,"prior_book_value_yen":0,"purpose_ja":"取引先の情報収集のために保有しております。","reciprocal":"無","pct_outstanding":7.71239591286206e-06,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.0,"pct_of_holder_assets":0.0,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":100159000000,"holder_total_assets_yen":165055000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"河西工業株式会社","holder_name_en":"KASAI  KOGYO  CO., LTD.","holder_sec_code":"7256","doc_id":"S100YWM7","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":14986,"prior_book_value_yen":20000000,"purpose_ja":"取引関係の維持・発展を目的として保有していたが、当事業年度に全株式を売却  ","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":26793000000,"holder_total_assets_yen":145329000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"住友ゴム工業株式会社","holder_name_en":"Sumitomo Rubber Industries, Ltd.","holder_sec_code":"5110","doc_id":"S100XT7A","period_end":"2025-12-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":3900,"prior_book_value_yen":6000000,"purpose_ja":"(保有目的)主に新車用タイヤの販売取引があり、取引関係維持・強化のために保有しておりました。","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"ifrs_consolidated_excl_nci","holder_equity_yen":716080000000,"holder_total_assets_yen":1459932000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"ユニプレス株式会社","holder_name_en":"UNIPRES CORPORATION","holder_sec_code":"5949","doc_id":"S100YCON","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":10226,"prior_book_value_yen":13000000,"purpose_ja":"取引先との関係の維持・強化。本田技研工業株式会社向け事業における受注増。","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":151546000000,"holder_total_assets_yen":292222000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"大同特殊鋼株式会社","holder_name_en":"Daido Steel Co., Ltd.","holder_sec_code":"5471","doc_id":"S100YNEC","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":7528300,"prior_book_value_yen":10106000000,"purpose_ja":"継続的取引関係の維持・強化を目的として保有しておりましたが、当事業年度に売却しております。","reciprocal":"有","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"ifrs_consolidated_excl_nci","holder_equity_yen":472565000000,"holder_total_assets_yen":856380000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"日本ペイントホールディングス株式会社","holder_name_en":"NIPPON PAINT HOLDINGS CO., LTD.","holder_sec_code":"4612","doc_id":"S100XU2S","period_end":"2025-12-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":3618480,"prior_book_value_yen":5554000000,"purpose_ja":"2025年１月31日に売却が完了しております。","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"ifrs_consolidated_excl_nci","holder_equity_yen":1803859000000,"holder_total_assets_yen":4017738000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社エクセディ","holder_name_en":"ＥＸＥＤＹ Ｃｏｒｐｏｒａｔｉｏｎ","holder_sec_code":"7278","doc_id":"S100YBAF","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":17707,"prior_book_value_yen":24000000,"purpose_ja":"・良好な取引関係維持のため・当社グループの製品を販売・取引先持株会を通じた取得","reciprocal":"－","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"ifrs_consolidated_excl_nci","holder_equity_yen":192711000000,"holder_total_assets_yen":320103000000,"implausible":false,"reciprocal_held_both_ways":null},{"holder_name":"三光合成株式会社","holder_name_en":"ＳＡＮＫＯ ＧＯＳＥＩ ＬＴＤ．","holder_sec_code":"7888","doc_id":"S100YZ2B","period_end":"2026-05-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":12504,"prior_book_value_yen":18000000,"purpose_ja":"保有目的：当社の取引先であり、取引関係の維持・強化のため。 ","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":35391000000,"holder_total_assets_yen":88363000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"東プレ株式会社","holder_name_en":"Topre Corporation","holder_sec_code":"5975","doc_id":"S100YHLP","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":1664708,"prior_book_value_yen":2234000000,"purpose_ja":"当社グループの営業取引等に係る協力関係維持（プレス関連製品事業）配当金の受取、更なる関係強化持株会による買付に伴い株式数が増加","reciprocal":"有","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":247283000000,"holder_total_assets_yen":389387000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"ＴＯＰＰＡＮホールディングス株式会社","holder_name_en":"TOPPAN Holdings Inc.","holder_sec_code":"7911","doc_id":"S100YIAY","period_end":"2026-03-31","holder_table":"second_largest","shares":null,"book_value_yen":null,"prior_shares":3000000,"prior_book_value_yen":4027000000,"purpose_ja":null,"reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":1410067000000,"holder_total_assets_yen":2558184000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"日本発條株式会社","holder_name_en":"NHK SPRING CO., LTD.","holder_sec_code":"5991","doc_id":"S100YD4O","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":450000,"prior_book_value_yen":604000000,"purpose_ja":"（前事業年度）自動車関連事業の各種製品を販売しており、懸架ばね事業及び精密部品事業のグローバルビジネスにおいて重要な取引先であります。継続的な取引関係の維持・発展のために保有しております。（当事業年度）取引関係や保有による便益やリスク等を総合的に勘案し検証した結果、当事業年度において全株式売却いたしました。","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":453035000000,"holder_total_assets_yen":738450000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社ニフコ","holder_name_en":"NIFCO INC.","holder_sec_code":"7988","doc_id":"S100YGQB","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":0,"prior_book_value_yen":0,"purpose_ja":"－","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":299571000000,"holder_total_assets_yen":393590000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"三ツ星ベルト株式会社","holder_name_en":"Mitsuboshi Belting Ltd.","holder_sec_code":"5192","doc_id":"S100YJBU","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":49831,"prior_book_value_yen":66000000,"purpose_ja":"当事業年度において、保有株式の見直しを行った結果、全株式を売却しております。","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":null,"pct_of_holder_assets":null,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":101619000000,"holder_total_assets_yen":129884000000,"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":[{"holder_table":"reporting","note_no":"1","text_ja":"(注)  １  定量的な保有効果については記載が困難です。保有の合理性は各銘柄について、中長期的な観点で取引の性質や規模等に加え、保有に伴う便益やリスク等を検証し判断しています。"},{"holder_table":"reporting","note_no":"2","text_ja":"２　㈱椿本チエインは、2026年１月１日付で大同工業㈱と株式交換しています。これに伴い、保有していた大同　　　　　工業㈱の普通株式１株に対して㈱椿本チエインの普通株式0.65株を割当交付されています。"}],"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":[{"holder_table":"reporting","share_class":"listed","issues_increased":null,"acquisition_cost_yen":null,"issues_decreased":19,"sale_proceeds_yen":36643000000,"entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","issues_increased":10,"acquisition_cost_yen":8122000000,"issues_decreased":2,"sale_proceeds_yen":267000000,"entity_scope":"parent_only","share_scope":"unlisted"}],"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":191949000000,"listed_yen":164629000000,"unlisted_yen":27320000000,"listed_issues":21,"unlisted_issues":58,"equity_yen":11817512000000,"equity_basis":"ifrs_consolidated_excl_nci","total_assets_yen":33509285000000,"assets_basis":"ifrs_consolidated","pct_of_equity":1.624275905114376,"pct_of_assets":0.5728233234460239,"equity_basis_label":"Consolidated equity attributable to owners of the parent (IFRS)","assets_basis_label":"Consolidated total equity (IFRS)","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":164629000000,"issue_count":21,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","book_value_yen":27320000000,"issue_count":58,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"unlisted"}],"scale_history":[{"year":"2022","period_end":"2022-03-31","policy_total_yen":213849000000,"equity_yen":10472824000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":2.041942077896086,"pct_of_assets":0.8920353530468019},{"year":"2023","period_end":"2023-03-31","policy_total_yen":258089000000,"equity_yen":11184250000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":2.307611149607707,"pct_of_assets":1.0461625418366314},{"year":"2024","period_end":"2024-03-31","policy_total_yen":378338000000,"equity_yen":12696995000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":2.9797444198410727,"pct_of_assets":1.2706928661271606},{"year":"2025","period_end":"2025-03-31","policy_total_yen":172670000000,"equity_yen":12326529000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":1.4007998520913714,"pct_of_assets":0.5610564927382874},{"year":"2026","period_end":"2026-03-31","policy_total_yen":191949000000,"equity_yen":11817512000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":1.624275905114376,"pct_of_assets":0.5728233234460239}],"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":47,"book_value_yen":103520000000},{"year":"2022","period_end":"2022-03-31","named_holdings":47,"book_value_yen":100756000000},{"year":"2023","period_end":"2023-03-31","named_holdings":47,"book_value_yen":134113000000},{"year":"2024","period_end":"2024-03-31","named_holdings":47,"book_value_yen":231477000000},{"year":"2025","period_end":"2025-03-31","named_holdings":47,"book_value_yen":155269000000},{"year":"2026","period_end":"2026-03-31","named_holdings":33,"book_value_yen":164620000000}],"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."}}