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CORPORATION","holder_sec_code":"3355","doc_id":"S100XTG9","period_end":"2025-12-31","holder_table":"second_largest","shares":90654,"book_value_yen":185660000,"prior_shares":null,"prior_book_value_yen":null,"purpose_ja":"（保有目的）産業資材事業の販売拡大を目的に仕入取引関係の維持・強化し、安定的に製品を確保する為。（定量的な保有効果）定量的な保有効果については、個別の取引内容等を踏まえた評価となり、秘密保持の必要性から記載していませんが、産業資材事業の売上と発展に寄与しています。（注）1","reciprocal":"無","pct_outstanding":0.22134682513537332,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.3769216359698311,"pct_of_holder_assets":0.20675857315024437,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":49256923000,"holder_total_assets_yen":89795551000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社ノザワ","holder_name_en":"NOZAWA CORPORATION","holder_sec_code":"5237","doc_id":"S100YK4Z","period_end":"2026-03-31","holder_table":"reporting","shares":84000,"book_value_yen":169596000,"prior_shares":84000,"prior_book_value_yen":138432000,"purpose_ja":"（保有目的）財務・経理・総務業務に関する情報収集の円滑化、経営効率追求に向けた連携強化及び地域経済における関係維持を通じて当社製品の今後の受注案件が期待できることにより保有しております。（定量的な保有効果）（注）１","reciprocal":"有","pct_outstanding":0.20509997696043591,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.7733211058168981,"pct_of_holder_assets":0.5569512870902674,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":21930864000,"holder_total_assets_yen":30450778000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"丸尾カルシウム株式会社","holder_name_en":"Maruo Calcium Co., Ltd.","holder_sec_code":"4102","doc_id":"S100YFE2","period_end":"2026-03-31","holder_table":"reporting","shares":82127,"book_value_yen":165813000,"prior_shares":80025,"prior_book_value_yen":131882000,"purpose_ja":"（保有目的）取引関係の維持強化（定量的な保有効果）（注）１（株式数が増加した理由）（注）２","reciprocal":"無","pct_outstanding":0.20052673580749666,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":1.6112428335438733,"pct_of_holder_assets":0.9677425002918174,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":10291000000,"holder_total_assets_yen":17134000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"日本ゼオン株式会社","holder_name_en":"ZEON CORPORATION","holder_sec_code":"4205","doc_id":"S100YJ12","period_end":"2026-03-31","holder_table":"reporting","shares":75500,"book_value_yen":152000000,"prior_shares":75500,"prior_book_value_yen":124000000,"purpose_ja":"同社は、エラストマー素材事業の販売を中心とした取引先であり、同社との事業活動上の関係を深め、新たな事業機会の創出等を目的として同社株式を保有しております。定量的な保有効果は当社の原価情報などが含まれるため記載いたしませんが、保有の合理性を精査し、継続して保有しております。","reciprocal":"有","pct_outstanding":0.1843458126251537,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.04018485031143259,"pct_of_holder_assets":0.02772478048175454,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":378252000000,"holder_total_assets_yen":548246000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"日鉄鉱業株式会社","holder_name_en":"Nittetsu Mining Co., Ltd.","holder_sec_code":"1515","doc_id":"S100YI8I","period_end":"2026-03-31","holder_table":"reporting","shares":38500,"book_value_yen":77000000,"prior_shares":38500,"prior_book_value_yen":63000000,"purpose_ja":"当社グループの鉱石部門の事業活動の円滑化及び鉱山採掘資材の安定調達を図るため同社株式を保有しております。 [取引：プラント物品の仕入]","reciprocal":"有","pct_outstanding":0.09400415610686647,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.04593669088783095,"pct_of_holder_assets":0.02480574204605492,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":167622000000,"holder_total_assets_yen":310412000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社カネミツ","holder_name_en":"KANEMITSU CORPORATION","holder_sec_code":"7208","doc_id":"S100YE6U","period_end":"2026-03-31","holder_table":"reporting","shares":25000,"book_value_yen":50475000,"prior_shares":25000,"prior_book_value_yen":41200000,"purpose_ja":"当社グループは同社と取引関係があり、取引関係、協力関係の維持・強化による自動車部品での収益拡大、自動車事業における情報共有","reciprocal":"有","pct_outstanding":0.06104165980965355,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.3966995228445482,"pct_of_holder_assets":0.31144941740602095,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":12723736000,"holder_total_assets_yen":16206484000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"モリテックスチール株式会社","holder_name_en":"MOLITEC STEEL CO., LTD．","holder_sec_code":"5986","doc_id":"S100YGQQ","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":36311000,"prior_shares":null,"prior_book_value_yen":28107000,"purpose_ja":"同社は、当社の鈑金加工品部門における主要な販売先であり、継続的な取引関係を維持・強化し、強固かつ長期的な信頼関係を保持するため、保有しております。取引先持株会を通じた株式の取得により株式数が増加しております。","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.2239318387769699,"pct_of_holder_assets":0.10328384956721959,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":16215202000,"holder_total_assets_yen":35156513000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"東海カーボン株式会社","holder_name_en":"TOKAI CARBON CO.,LTD.","holder_sec_code":"5301","doc_id":"S100XU85","period_end":"2025-12-31","holder_table":"reporting","shares":14006,"book_value_yen":28000000,"prior_shares":14006,"prior_book_value_yen":26000000,"purpose_ja":"事業機会の創出や取引・協業関係の構築・維持・強化等を通じた中長期的な企業価値の向上。","reciprocal":"無","pct_outstanding":0.0341979794917603,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.007935473265957387,"pct_of_holder_assets":0.004216657907061848,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":352846000000,"holder_total_assets_yen":664033000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"アキレス株式会社","holder_name_en":"Achilles Corporation","holder_sec_code":"5142","doc_id":"S100YJF9","period_end":"2026-03-31","holder_table":"reporting","shares":500,"book_value_yen":1000000,"prior_shares":500,"prior_book_value_yen":0,"purpose_ja":"（保有目的、業務提携等の概要）当社が属する業界動向及び同業他社の情報収集をする目的で株式を保有しております。（定量的な保有効果）（注）１","reciprocal":"無","pct_outstanding":0.001220833196193071,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.002310429277759808,"pct_of_holder_assets":0.0011957717510881524,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":43282000000,"holder_total_assets_yen":83628000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"ＭＳ＆ＡＤインシュアランスグループホールディングス株式会社","holder_name_en":"MS&AD Insurance Group Holdings, Inc.","holder_sec_code":"8725","doc_id":"S100YNCJ","period_end":"2026-03-31","holder_table":"second_largest","shares":null,"book_value_yen":null,"prior_shares":741022,"prior_book_value_yen":1221000000,"purpose_ja":"保険取引先との関係の維持・強化を目的として安定保有していたが、保有方針については③a.(a)に記載のとおり","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":4825140000000,"holder_total_assets_yen":28640815000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"みずほリース株式会社","holder_name_en":"Mizuho Leasing Company, Limited","holder_sec_code":"8425","doc_id":"S100YESP","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":100000,"prior_book_value_yen":164000000,"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":454469000000,"holder_total_assets_yen":4175256000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"オイレス工業株式会社","holder_name_en":"OILES CORPORATION","holder_sec_code":"6282","doc_id":"S100YLBX","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":321500,"prior_book_value_yen":529000000,"purpose_ja":"構造機器事業において取引・協業関係にあり、関係維持強化を目的に保有していましたが、当年度に売却いたしました。","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":80616000000,"holder_total_assets_yen":99429000000,"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、取引先との秘密保持の観点から記載することが困難であります。なお、保有の合理性を検証した方法については、「②保有目的が純投資目的以外の目的である投資株式」の「ａ．保有方針および保有の合理性を検証する方法ならびに個別銘柄の保有の適否に関する取締役会等における検証の内容」に記載のとおりであります。"},{"holder_table":"reporting","note_no":"2","text_ja":"２．日鉄鉱業株式会社の株式数については、2025年10月１日付で普通株式１株を５株にする株式分割が実施されたため、当該事業年度の株式数は分割後の株式数で記載しております。"}],"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":2,"sale_proceeds_yen":334000000,"entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","issues_increased":1,"acquisition_cost_yen":49000000,"issues_decreased":null,"sale_proceeds_yen":null,"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":10737000000,"listed_yen":10583000000,"unlisted_yen":154000000,"listed_issues":14,"unlisted_issues":26,"equity_yen":92608000000,"equity_basis":"ifrs_consolidated_excl_nci","total_assets_yen":131892000000,"assets_basis":"ifrs_consolidated","pct_of_equity":11.594030753282654,"pct_of_assets":8.14075152397416,"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":10583000000,"issue_count":14,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","book_value_yen":154000000,"issue_count":26,"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":4315000000,"equity_yen":72133000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":5.98200546213245,"pct_of_assets":3.7076498741203463},{"year":"2023","period_end":"2023-03-31","policy_total_yen":4591000000,"equity_yen":77656000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":5.911970742762954,"pct_of_assets":3.8589236032310397},{"year":"2024","period_end":"2024-03-31","policy_total_yen":7440000000,"equity_yen":85163000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":8.736188250766178,"pct_of_assets":5.92252949324163},{"year":"2025","period_end":"2025-03-31","policy_total_yen":8644000000,"equity_yen":82131000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":10.524649645079203,"pct_of_assets":7.161972939607102},{"year":"2026","period_end":"2026-03-31","policy_total_yen":10737000000,"equity_yen":92608000000,"equity_basis":"ifrs_consolidated_excl_nci","pct_of_equity":11.594030753282654,"pct_of_assets":8.14075152397416}],"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":"2022","period_end":"2022-03-31","named_holdings":20,"book_value_yen":4198000000},{"year":"2023","period_end":"2023-03-31","named_holdings":18,"book_value_yen":4475000000},{"year":"2024","period_end":"2024-03-31","named_holdings":16,"book_value_yen":7273000000},{"year":"2025","period_end":"2025-03-31","named_holdings":16,"book_value_yen":8534000000},{"year":"2026","period_end":"2026-03-31","named_holdings":16,"book_value_yen":10578000000}],"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."}}