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LTD.","holder_sec_code":"1720","doc_id":"S100YFDZ","period_end":"2026-03-31","holder_table":"reporting","shares":21500,"book_value_yen":35000000,"prior_shares":21500,"prior_book_value_yen":31000000,"purpose_ja":"建設事業における取引関係にあり、長期的な取引関係の開拓・維持を通じて、当社の企業価値の向上に資すると判断し、保有しております。","reciprocal":"無","pct_outstanding":0.006266160555581927,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.031062515531257766,"pct_of_holder_assets":0.011259486117053618,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":112676000000,"holder_total_assets_yen":310849000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"鉄建建設株式会社","holder_name_en":"TEKKEN CORPORATION","holder_sec_code":"1815","doc_id":"S100YGCF","period_end":"2026-03-31","holder_table":"reporting","shares":21640,"book_value_yen":35000000,"prior_shares":21640,"prior_book_value_yen":31000000,"purpose_ja":"建設工事を受注しており、良好な取引関係の維持、発展を図るため、株式を継続して保有しています。定量的な保有効果の記載は困難ですが、建設工事の発注者として、過去の受注実績や今後の営業案件が期待できることにより保有の合理性があることを確認しています。","reciprocal":"無","pct_outstanding":0.006306963461525251,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.04444670205470754,"pct_of_holder_assets":0.013676843540817562,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":78746000000,"holder_total_assets_yen":255907000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"西松建設株式会社","holder_name_en":"Nishimatsu Construction Co., Ltd.","holder_sec_code":"1820","doc_id":"S100YEDU","period_end":"2026-03-31","holder_table":"reporting","shares":21640,"book_value_yen":35000000,"prior_shares":21640,"prior_book_value_yen":31000000,"purpose_ja":"工事請負に係る取引を行っており、主に鉄道関連工事等における中長期的な受注の確保に向けて、同社との良好な関係の維持、強化を図るため、継続して保有しております。なお、同社との守秘義務上、定量的な保有効果の記載は困難でありますが、上記aの方法により保有の合理性を検証しております。","reciprocal":"無","pct_outstanding":0.006306963461525251,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.01712161236669602,"pct_of_holder_assets":0.005101951569360302,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":204420000000,"holder_total_assets_yen":686012000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社ナカノフドー建設","holder_name_en":"NAKANO CORPORATION","holder_sec_code":"1827","doc_id":"S100YHMT","period_end":"2026-03-31","holder_table":"reporting","shares":16505,"book_value_yen":27000000,"prior_shares":16505,"prior_book_value_yen":24000000,"purpose_ja":"建設事業における顧客層拡大を目指すため保有する。","reciprocal":"無","pct_outstanding":0.004810371161389754,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.0525373599003736,"pct_of_holder_assets":0.026790232479684074,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":51392000000,"holder_total_assets_yen":100783000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社ミライト・ワン","holder_name_en":"MIRAIT ONE Corporation","holder_sec_code":"1417","doc_id":"S100YG40","period_end":"2026-03-31","holder_table":"reporting","shares":7000,"book_value_yen":11000000,"prior_shares":7000,"prior_book_value_yen":10000000,"purpose_ja":"保有先企業は、当社が工事を請け負っている重要顧客の一つであり、企業／環境社会基盤ドメインにおける中期的な工事受注量の確保等に資するため、保有しております。","reciprocal":"無","pct_outstanding":0.002040145297166209,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.0038135255350202984,"pct_of_holder_assets":0.0019184050032002484,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":288447000000,"holder_total_assets_yen":573393000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"エクシオグループ株式会社","holder_name_en":"EXEO Group, Inc.","holder_sec_code":"1951","doc_id":"S100YI51","period_end":"2026-03-31","holder_table":"reporting","shares":7137,"book_value_yen":11000000,"prior_shares":7137,"prior_book_value_yen":10000000,"purpose_ja":"同社株式は、鉄道通信設備や監視システム等に係る案件の受注や情報交換等、都市インフラ事業の円滑化のため、保有しております。","reciprocal":"無","pct_outstanding":0.0020800738551250333,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.003172442434590005,"pct_of_holder_assets":0.0015915411037192868,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":346736000000,"holder_total_assets_yen":691154000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社丹青社","holder_name_en":"TANSEISHA CO.,LTD.","holder_sec_code":"9743","doc_id":"S100Y04L","period_end":"2026-01-31","holder_table":"reporting","shares":3530,"book_value_yen":5000000,"prior_shares":3530,"prior_book_value_yen":5000000,"purpose_ja":"ディスプレイ関連事業の取引の安定的、長期的な維持・強化のため保有しております。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取締役会において検証しております。","reciprocal":"無","pct_outstanding":0.0010288161284281025,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.013274923669188901,"pct_of_holder_assets":0.008972633467922835,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":37665000000,"holder_total_assets_yen":55725000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"富士急行株式会社","holder_name_en":"FUJI KYUKO CO., LTD.","holder_sec_code":"9010","doc_id":"S100YBGE","period_end":"2026-03-31","holder_table":"reporting","shares":2000,"book_value_yen":3290000,"prior_shares":2000,"prior_book_value_yen":2956000,"purpose_ja":"(a)首都圏で鉄道・バス事業等を営む同社と   の情報交換等、協力関係の構築。(b)1520.99％(c)－","reciprocal":"有","pct_outstanding":0.0005828986563332025,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.0076519174833034114,"pct_of_holder_assets":0.0032007859651547845,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":42995759000,"holder_total_assets_yen":102787254000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"日本信号株式会社","holder_name_en":"Nippon Signal Co., Ltd.","holder_sec_code":"6741","doc_id":"S100YAO1","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":94733,"prior_book_value_yen":140000000,"purpose_ja":"当事業年度において、株式保有状況の見直しを図り、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":114336000000,"holder_total_assets_yen":172224000000,"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、秘密保持等の観点から記載を控えさせていただきますが、事業上の関係の維持・発展への貢献度等の定性的観点のほか、資本コスト、配当収益その他の定量的観点から、取締役会において、保有のねらい・合理性に関する検証を銘柄ごとに実施しています。"},{"holder_table":"reporting","note_no":"2","text_ja":"２　持株会社における「当社の株式の保有の有無」については、各銘柄の主要な子会社の保有状況も踏まえ記載しています。なお「※」は、当該銘柄は当社の株式を保有していないものの、当該銘柄の主要な子会社が当社の株式を保有している場合に記載しています。"},{"holder_table":"reporting","note_no":"3","text_ja":"３　当該銘柄が退職給付信託として当社の株式を信託設定している場合、「当社の株式の保有の有無」については「有」と記載しています。"}],"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":3,"sale_proceeds_yen":6867000000,"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":27000000,"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":42894000000,"listed_yen":42503000000,"unlisted_yen":391000000,"listed_issues":22,"unlisted_issues":25,"equity_yen":508783000000,"equity_basis":"jgaap_consolidated","total_assets_yen":1393521000000,"assets_basis":"jgaap_consolidated","pct_of_equity":8.430706214633744,"pct_of_assets":3.078102159924393,"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":42503000000,"issue_count":22,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","book_value_yen":391000000,"issue_count":25,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"unlisted"}],"scale_history":[{"year":"2020","period_end":"2020-03-31","policy_total_yen":52434000000,"equity_yen":390183000000,"equity_basis":"jgaap_consolidated","pct_of_equity":13.438309716210085,"pct_of_assets":3.9474427145011344},{"year":"2022","period_end":"2022-03-31","policy_total_yen":32350000000,"equity_yen":349257000000,"equity_basis":"jgaap_consolidated","pct_of_equity":9.262520149918256,"pct_of_assets":2.517059203411063},{"year":"2023","period_end":"2023-03-31","policy_total_yen":34868000000,"equity_yen":388490000000,"equity_basis":"jgaap_consolidated","pct_of_equity":8.97526319853793,"pct_of_assets":2.7241135771295713},{"year":"2024","period_end":"2024-03-31","policy_total_yen":45053000000,"equity_yen":460109000000,"equity_basis":"jgaap_consolidated","pct_of_equity":9.791810201495732,"pct_of_assets":3.4614430144587254},{"year":"2025","period_end":"2025-03-31","policy_total_yen":37731000000,"equity_yen":479263000000,"equity_basis":"jgaap_consolidated","pct_of_equity":7.872712894590236,"pct_of_assets":2.9024047089556775},{"year":"2026","period_end":"2026-03-31","policy_total_yen":42894000000,"equity_yen":508783000000,"equity_basis":"jgaap_consolidated","pct_of_equity":8.430706214633744,"pct_of_assets":3.078102159924393}],"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":45,"book_value_yen":65130000000},{"year":"2020","period_end":"2020-03-31","named_holdings":45,"book_value_yen":51999000000},{"year":"2022","period_end":"2022-03-31","named_holdings":38,"book_value_yen":31923000000},{"year":"2023","period_end":"2023-03-31","named_holdings":26,"book_value_yen":34439000000},{"year":"2024","period_end":"2024-03-31","named_holdings":24,"book_value_yen":44629000000},{"year":"2025","period_end":"2025-03-31","named_holdings":24,"book_value_yen":37322000000},{"year":"2026","period_end":"2026-03-31","named_holdings":22,"book_value_yen":42492000000}],"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."}}