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CORPORATION","holder_sec_code":"7487","doc_id":"S100YY6D","period_end":"2026-05-31","holder_table":"reporting","shares":54000,"book_value_yen":184788000,"prior_shares":54000,"prior_book_value_yen":131652000,"purpose_ja":"当社グループにおいて材料購入などの取引があり、事業活動の円滑化、取引関係の構築・維持・強化及び今後の事業提携などの長期的経営戦略遂行のため保有しています。","reciprocal":"有","pct_outstanding":0.061932977782989326,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.9631568577781531,"pct_of_holder_assets":0.7220254410150524,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":19185660000,"holder_total_assets_yen":25593004000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"四国化成ホールディングス株式会社","holder_name_en":"SHIKOKU KASEI HOLDINGS CORPORATION","holder_sec_code":"4099","doc_id":"S100YZOS","period_end":"2025-12-31","holder_table":"reporting","shares":50000,"book_value_yen":154000000,"prior_shares":50000,"prior_book_value_yen":154000000,"purpose_ja":"同社株式は、当社化学品セグメントの事業活動円滑化のために保有しています。","reciprocal":"有","pct_outstanding":0.05734534979906419,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.1627924185245087,"pct_of_holder_assets":0.10664598380920064,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":94599000000,"holder_total_assets_yen":144403000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"ピー・シー・エー株式会社","holder_name_en":"PCA CORPORATION","holder_sec_code":"9629","doc_id":"S100YGVP","period_end":"2026-03-31","holder_table":"reporting","shares":50000,"book_value_yen":153000000,"prior_shares":50000,"prior_book_value_yen":126000000,"purpose_ja":"（保有目的）企業間取引の強化（定量的な保有効果）中長期的な営業施策の共有、各年度における実行計画等の打合せを定期的に行い、当社における有意義な情報交換を行っております。","reciprocal":"有","pct_outstanding":0.05734534979906419,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.8030652949821541,"pct_of_holder_assets":0.43219118104008364,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":19052000000,"holder_total_assets_yen":35401000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"エレコム株式会社","holder_name_en":"ELECOM CO., LTD.","holder_sec_code":"6750","doc_id":"S100YK25","period_end":"2026-03-31","holder_table":"reporting","shares":47500,"book_value_yen":145000000,"prior_shares":47500,"prior_book_value_yen":120000000,"purpose_ja":"当社の全品目に関連する主要な販売先であり、安定的な営業関係取引の維持・強化及び相互の取り組みによる将来的な企業価値向上が保有の目的です。定量的な保有効果については合理的に見積もることは困難な為記載しておりませんが、取引状況等を含めた総合的な判断により保有効果を評価しています。","reciprocal":"有","pct_outstanding":0.05447808230911098,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.13403214922862186,"pct_of_holder_assets":0.09985882028855755,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":108183000000,"holder_total_assets_yen":145205000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社アイ・オー・データ機器","holder_name_en":"I-O DATA DEVICE, INC.","holder_sec_code":"6916","doc_id":"S100MGRS","period_end":"2021-06-30","holder_table":"reporting","shares":50000,"book_value_yen":95000000,"prior_shares":10000,"prior_book_value_yen":70000000,"purpose_ja":"(保有目的)販売先として、同社との良好な取引関係の維持・強化を図るため(増加理由)株式分割による増加","reciprocal":"有","pct_outstanding":0.052574378024078224,"pct_unavailable":null,"pct_basis_period_end":"2022-03-31","pct_share_classes":1,"pct_of_holder_equity":0.32698860702853405,"pct_of_holder_assets":0.2220196779546145,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":29053000000,"holder_total_assets_yen":42789000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社ＺＯＡ","holder_name_en":"ZOA CORPORATION","holder_sec_code":"3375","doc_id":"S100YKCU","period_end":"2026-03-31","holder_table":"reporting","shares":30000,"book_value_yen":91950000,"prior_shares":30000,"prior_book_value_yen":75855000,"purpose_ja":"主要な仕入先であり、良好な関係の維持・拡大を図る目的で保有しております。定量的な保有効果は秘密保持の観点から記載いたしませんが、保有の便益と当社資本コストの比較により経済合理性を検証しております。","reciprocal":"有","pct_outstanding":0.034407209879438516,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":2.8855486888876407,"pct_of_holder_assets":1.7415772155106628,"holder_equity_basis":"parent_only","holder_equity_yen":3186569000,"holder_total_assets_yen":5279697000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"ＮＣＳ＆Ａ株式会社","holder_name_en":"NCS&A CO., LTD.","holder_sec_code":"9709","doc_id":"S100YAMN","period_end":"2026-03-31","holder_table":"reporting","shares":12000,"book_value_yen":36780000,"prior_shares":12000,"prior_book_value_yen":30342000,"purpose_ja":"(保有目的）機器・パッケージにおける購買関係取引の維持・強化","reciprocal":"無（注）３","pct_outstanding":0.013762883951775405,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.26525118594973557,"pct_of_holder_assets":0.17193981489402702,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":13866102000,"holder_total_assets_yen":21391206000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社第四北越フィナンシャルグループ","holder_name_en":"Daishi Hokuetsu Financial Group, Inc.","holder_sec_code":"7327","doc_id":"S100YAX4","period_end":"2026-03-31","holder_table":"largest","shares":null,"book_value_yen":null,"prior_shares":600000,"prior_book_value_yen":1517000000,"purpose_ja":"－","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":"jgaap_consolidated","holder_equity_yen":569451000000,"holder_total_assets_yen":10840284000000,"implausible":false,"reciprocal_held_both_ways":null},{"holder_name":"富士通株式会社","holder_name_en":"Fujitsu Limited","holder_sec_code":"6702","doc_id":"S100YM3K","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":50000,"prior_book_value_yen":126000000,"purpose_ja":"当社プロダクトの重要な販売チャネルであり、関係強化を目的として取得し、保有していましたが、当事業年度において、すべての株式を売却いたしました。","reciprocal":"有（注）","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","holder_equity_yen":2044587000000,"holder_total_assets_yen":3399745000000,"implausible":false,"reciprocal_held_both_ways":true},{"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":211500,"prior_book_value_yen":534000000,"purpose_ja":"同社の子会社は当社子会社の情報システム関連の購入先であり、取引関係の維持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）当社は、特定投資株式における定量的な保有効果について、取引高等より算出した便益と当社の資本コストとの水準を比較しておりますが、受取配当金につきましては記載しているもののその他取引高等の項目につきましては、相手先企業との関係上記載が困難であるため、保有の合理性を検証した方法について記載いたします。当社は、コーポレート・ガバナンス報告書に記載のとおり毎年、取締役会で個別の政策保有株式について、政策保有の意義、経済合理性等を検証し、保有継続の可否及び保有株式数を見直しており、当社の中長期における企業価値向上につながらないと判断される株式は、相手先企業と十分な対話を行い縮減等をはかっており、2026年２月26日開催の取締役会において2025年12月31日を基準日とした検証の結果、現状保有する政策保有株式につきましては保有方針に沿った目的で保有していることを確認しております。"},{"holder_table":"second_largest","note_no":"1","text_ja":"（注）　当社は、特定投資株式における定量的な保有効果について、取引高等より算出した便益と当社の資本コストとの水準を比較しておりますが、受取配当金につきましては記載しているもののその他取引高等の項目につきましては、相手先企業との関係上記載が困難であるため、保有の合理性を検証した方法について記載いたします。当社は、コーポレート・ガバナンス報告書に記載のとおり毎年、取締役会で個別の政策保有株式について、政策保有の意義、経済合理性等を検証し、保有継続の可否及び保有株式数を見直しており、当社の中長期における企業価値向上につながらないと判断される株式は、相手先企業と十分な対話を行い縮減等をはかっており、2026年２月26日開催の取締役会において2025年12月31日を基準日とした検証の結果、現状保有する政策保有株式につきましては保有方針に沿った目的で保有していることを確認しております。"}],"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":null,"sale_proceeds_yen":null,"entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","issues_increased":null,"acquisition_cost_yen":null,"issues_decreased":1,"sale_proceeds_yen":1620000000,"entity_scope":"parent_only","share_scope":"unlisted"},{"holder_table":"second_largest","share_class":"listed","issues_increased":null,"acquisition_cost_yen":null,"issues_decreased":null,"sale_proceeds_yen":null,"entity_scope":"second_largest_holding_company","share_scope":"listed"},{"holder_table":"second_largest","share_class":"unlisted","issues_increased":1,"acquisition_cost_yen":25000000,"issues_decreased":null,"sale_proceeds_yen":null,"entity_scope":"second_largest_holding_company","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":9925000000,"listed_yen":9693000000,"unlisted_yen":232000000,"listed_issues":36,"unlisted_issues":27,"equity_yen":169829000000,"equity_basis":"jgaap_consolidated","total_assets_yen":462072000000,"assets_basis":"jgaap_consolidated","pct_of_equity":5.844113785042602,"pct_of_assets":2.147933655361069,"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":7200000000,"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":166000000,"issue_count":21,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"unlisted"},{"holder_table":"second_largest","share_class":"listed","book_value_yen":2493000000,"issue_count":22,"holder_table_label":"Second largest holder in the group","entity_scope":"second_largest_holding_company","share_scope":"listed"},{"holder_table":"second_largest","share_class":"unlisted","book_value_yen":66000000,"issue_count":6,"holder_table_label":"Second largest holder in the group","entity_scope":"second_largest_holding_company","share_scope":"unlisted"}],"scale_history":[{"year":"2022","period_end":"2022-03-31","policy_total_yen":3372000000,"equity_yen":136173000000,"equity_basis":"jgaap_consolidated","pct_of_equity":2.476261814015994,"pct_of_assets":0.9466512073171759},{"year":"2023","period_end":"2023-03-31","policy_total_yen":3501000000,"equity_yen":143961000000,"equity_basis":"jgaap_consolidated","pct_of_equity":2.4319086419238545,"pct_of_assets":0.8608564796600834},{"year":"2024","period_end":"2024-03-31","policy_total_yen":8316000000,"equity_yen":142133000000,"equity_basis":"jgaap_consolidated","pct_of_equity":5.850857999197935,"pct_of_assets":2.0520362437570325},{"year":"2025","period_end":"2025-03-31","policy_total_yen":9313000000,"equity_yen":152310000000,"equity_basis":"jgaap_consolidated","pct_of_equity":6.1145033156063295,"pct_of_assets":2.1160041988357774},{"year":"2026","period_end":"2026-03-31","policy_total_yen":9925000000,"equity_yen":169829000000,"equity_basis":"jgaap_consolidated","pct_of_equity":5.844113785042602,"pct_of_assets":2.147933655361069}],"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":24,"book_value_yen":2954000000},{"year":"2023","period_end":"2023-03-31","named_holdings":23,"book_value_yen":3090000000},{"year":"2024","period_end":"2024-03-31","named_holdings":24,"book_value_yen":5726000000},{"year":"2025","period_end":"2025-03-31","named_holdings":24,"book_value_yen":6716000000},{"year":"2026","period_end":"2026-03-31","named_holdings":24,"book_value_yen":9364000000}],"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."}}