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CORPORATION","holder_sec_code":"4205","doc_id":"S100YJ12","period_end":"2026-03-31","holder_table":"reporting","shares":98985,"book_value_yen":186000000,"prior_shares":98824,"prior_book_value_yen":198000000,"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、当事業年度に同社株式を取得しております。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":0.49048595496180913,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.049173566828463564,"pct_of_holder_assets":0.033926376115831214,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":378252000000,"holder_total_assets_yen":548246000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社サンエー化研","holder_name_en":"Sun A.Kaken Company,Limited","holder_sec_code":"4234","doc_id":"S100YK61","period_end":"2026-03-31","holder_table":"reporting","shares":55847,"book_value_yen":104770000,"prior_shares":54514,"prior_book_value_yen":109465000,"purpose_ja":"（保有目的）営業上の関係強化のため（定量的な保有効果）（注）１（株式数が増加した理由）取引先持株会を通じた取得","reciprocal":"無","pct_outstanding":0.2767305059024312,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.4507074002567359,"pct_of_holder_assets":0.26976174736195696,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":23245680000,"holder_total_assets_yen":38837975000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"恵和株式会社","holder_name_en":"KEIWA Incorporated","holder_sec_code":"4251","doc_id":"S100XS6Z","period_end":"2025-12-31","holder_table":"reporting","shares":35347,"book_value_yen":70589000,"prior_shares":34684,"prior_book_value_yen":73322000,"purpose_ja":"（保有目的）機能製品事業セグメントの事業運営の円滑化、良好な取引関係の維持・強化を行うため（業務提携等の概要）該当事項はありません（定量的な保有効果）（注）１（増加理由）上記の保有目的による取得","reciprocal":"無","pct_outstanding":0.17514984139046388,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.2957922195948297,"pct_of_holder_assets":0.22810059472441963,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":23864387000,"holder_total_assets_yen":30946434000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"荒川化学工業株式会社","holder_name_en":"ARAKAWA CHEMICAL INDUSTRIES, LTD.","holder_sec_code":"4968","doc_id":"S100YF3H","period_end":"2026-03-31","holder_table":"reporting","shares":30423,"book_value_yen":57000000,"prior_shares":29757,"prior_book_value_yen":59000000,"purpose_ja":"粘接着・バイオマス事業における長期的かつ安定的な販売取引関係の維持・強化取引先持株会における株式買付による増加","reciprocal":"無","pct_outstanding":0.15075066129012596,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.0962187711006077,"pct_of_holder_assets":0.04521692223482655,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":59240000000,"holder_total_assets_yen":126059000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"王子ホールディングス株式会社","holder_name_en":"Oji Holdings Corporation","holder_sec_code":"3861","doc_id":"S100YJ8J","period_end":"2026-03-31","holder_table":"reporting","shares":25000,"book_value_yen":46000000,"prior_shares":25000,"prior_book_value_yen":50000000,"purpose_ja":"同上","reciprocal":"無","pct_outstanding":0.12387885916093579,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.00404615430625166,"pct_of_holder_assets":0.0017119820882013173,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":1136882000000,"holder_total_assets_yen":2686944000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"笹徳印刷株式会社","holder_name_en":"Sasatoku Printing Co., Ltd.","holder_sec_code":"3958","doc_id":"S100Z33V","period_end":"2026-06-30","holder_table":"reporting","shares":12535,"book_value_yen":23479000,"prior_shares":12344,"prior_book_value_yen":23886000,"purpose_ja":"(保有目的)コミュニケーション分野における事業上の関係強化を図るため、継続的に保有しており、持株会を通じた取得により株式数が増加しております。(定量的な保有効果)(注)２","reciprocal":"無","pct_outstanding":0.0621128599832932,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.24366791878704666,"pct_of_holder_assets":0.1516129613422787,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":9635655000,"holder_total_assets_yen":15486143000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"久光製薬株式会社","holder_name_en":"HISAMITSU PHARMACEUTICAL CO.,INC.","holder_sec_code":"4530","doc_id":"S100VT69","period_end":"2025-02-28","holder_table":"reporting","shares":500,"book_value_yen":1000000,"prior_shares":null,"prior_book_value_yen":null,"purpose_ja":"協力関係の構築により、企業価値向上を図るため。","reciprocal":"無","pct_outstanding":0.002456096537562116,"pct_unavailable":null,"pct_basis_period_end":"2025-03-31","pct_share_classes":1,"pct_of_holder_equity":0.00035790083999327147,"pct_of_holder_assets":0.00029148740191448926,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":279407000000,"holder_total_assets_yen":343068000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"東ソー株式会社","holder_name_en":"TOSOH CORPORATION","holder_sec_code":"4042","doc_id":"S100YE5Q","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":25000,"prior_book_value_yen":50000000,"purpose_ja":"石油化学事業における当社関係会社の製品の販売先であり、同社との取引関係の維持・発展のため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":"jgaap_consolidated","holder_equity_yen":919141000000,"holder_total_assets_yen":1408950000000,"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) 定量的な保有効果については記載が困難であります。保有の合理性は、当社への影響度合により検証しております。"}],"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":1,"acquisition_cost_yen":1000000,"issues_decreased":null,"sale_proceeds_yen":null,"entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","issues_increased":1,"acquisition_cost_yen":4000000,"issues_decreased":1,"sale_proceeds_yen":15000000,"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":1309000000,"listed_yen":1158000000,"unlisted_yen":151000000,"listed_issues":20,"unlisted_issues":12,"equity_yen":44325000000,"equity_basis":"jgaap_consolidated","total_assets_yen":67307000000,"assets_basis":"jgaap_consolidated","pct_of_equity":2.9531866892272984,"pct_of_assets":1.9448200038628969,"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":1158000000,"issue_count":20,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","book_value_yen":151000000,"issue_count":12,"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":842000000,"equity_yen":38961000000,"equity_basis":"jgaap_consolidated","pct_of_equity":2.161135494468828,"pct_of_assets":1.3069054899343442},{"year":"2023","period_end":"2023-03-31","policy_total_yen":862000000,"equity_yen":40603000000,"equity_basis":"jgaap_consolidated","pct_of_equity":2.122995837745979,"pct_of_assets":1.2470523559451991},{"year":"2024","period_end":"2024-03-31","policy_total_yen":1059000000,"equity_yen":41703000000,"equity_basis":"jgaap_consolidated","pct_of_equity":2.5393856557082226,"pct_of_assets":1.556460265436},{"year":"2025","period_end":"2025-03-31","policy_total_yen":1094000000,"equity_yen":43187000000,"equity_basis":"jgaap_consolidated","pct_of_equity":2.533169703846065,"pct_of_assets":1.6182713784891203},{"year":"2026","period_end":"2026-03-31","policy_total_yen":1309000000,"equity_yen":44325000000,"equity_basis":"jgaap_consolidated","pct_of_equity":2.9531866892272984,"pct_of_assets":1.9448200038628969}],"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":21,"book_value_yen":683000000},{"year":"2023","period_end":"2023-03-31","named_holdings":21,"book_value_yen":699000000},{"year":"2024","period_end":"2024-03-31","named_holdings":21,"book_value_yen":894000000},{"year":"2025","period_end":"2025-03-31","named_holdings":21,"book_value_yen":924000000},{"year":"2026","period_end":"2026-03-31","named_holdings":20,"book_value_yen":1147000000}],"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."}}