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CO.,LTD.","holder_sec_code":"6797","doc_id":"S100YEDT","period_end":"2026-03-31","holder_table":"reporting","shares":86600,"book_value_yen":138560000,"prior_shares":86600,"prior_book_value_yen":77507000,"purpose_ja":"主に社会インフラ事業での取引先であり取引関係強化を目的に所有しております。","reciprocal":"有","pct_outstanding":0.13884657043519774,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.5775507571287775,"pct_of_holder_assets":0.4739165477970457,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":23990965000,"holder_total_assets_yen":29237215000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"サンユー建設株式会社","holder_name_en":"SANYU CONSTRUCTION CO.,LTD.","holder_sec_code":"1841","doc_id":"S100W7B1","period_end":"2025-03-31","holder_table":"reporting","shares":null,"book_value_yen":125003000,"prior_shares":null,"prior_book_value_yen":140603000,"purpose_ja":"金属製品事業関連取引関係の維持・強化取引先持ち株会を通じた取得","reciprocal":"無","pct_outstanding":null,"pct_unavailable":null,"pct_basis_period_end":"2025-03-31","pct_share_classes":1,"pct_of_holder_equity":1.0792868243826628,"pct_of_holder_assets":0.8665118535976709,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":11582000000,"holder_total_assets_yen":14426000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"新光商事株式会社","holder_name_en":"Shinko Shoji Co., Ltd.","holder_sec_code":"8141","doc_id":"S100YME7","period_end":"2026-03-31","holder_table":"reporting","shares":78729,"book_value_yen":125000000,"prior_shares":77691,"prior_book_value_yen":69000000,"purpose_ja":"(保有目的)主に安定的な営業取引により協力関係・取引関係の維持及び株式保有による収益獲得を通じた企業成長を通して中長期的に当社の企業価値を向上させるとの視点に立ち、株式を保有しています。(定量的な保有効果)(注)１(株式数が増加した理由)持株会を通じた取得","reciprocal":"有","pct_outstanding":0.12622692429321805,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.23346594198838275,"pct_of_holder_assets":0.15471062923907125,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":53541000000,"holder_total_assets_yen":80796000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社西武ホールディングス","holder_name_en":"SEIBU HOLDINGS INC.","holder_sec_code":"9024","doc_id":"S100YS3Z","period_end":"2026-03-31","holder_table":"largest","shares":65625,"book_value_yen":105000000,"prior_shares":65625,"prior_book_value_yen":58000000,"purpose_ja":"鉄道安全輸送における機能の維持・強化を企図して保有","reciprocal":"有","pct_outstanding":0.10521716148741168,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.018275585384405182,"pct_of_holder_assets":0.006067070598744752,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":574537000000,"holder_total_assets_yen":1730654000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"芙蓉総合リース株式会社","holder_name_en":"Fuyo General Lease Co., Ltd.","holder_sec_code":"8424","doc_id":"S100YF6A","period_end":"2026-03-31","holder_table":"reporting","shares":49000,"book_value_yen":78000000,"prior_shares":49000,"prior_book_value_yen":43000000,"purpose_ja":"金融サービス等を主体とした継続的な取引関係の維持・拡大のため","reciprocal":"無","pct_outstanding":0.07856214724393405,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.013724927812158526,"pct_of_holder_assets":0.0020292814912617318,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":568309000000,"holder_total_assets_yen":3843725000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"佐鳥電機株式会社","holder_name_en":"SATORI ELECTRIC CO., LTD.","holder_sec_code":"7420","doc_id":"S100WKMY","period_end":"2025-05-31","holder_table":"reporting","shares":53509,"book_value_yen":56000000,"prior_shares":51413,"prior_book_value_yen":51000000,"purpose_ja":"産業インフラセグメントにおいて、ケーブル、光通信部品の販売先であり、営業取引を通じ、当社の中長期的な企業価値向上に資するものと判断し、株式を保有しております。なお、株式数の増加は、持株会による定期拠出によるものであります。","reciprocal":"無","pct_outstanding":0.08579119299989783,"pct_unavailable":null,"pct_basis_period_end":"2025-03-31","pct_share_classes":1,"pct_of_holder_equity":0.16813787305590586,"pct_of_holder_assets":0.07075173720783323,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":33306000000,"holder_total_assets_yen":79150000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"パラカ株式会社","holder_name_en":"Paraca Inc.","holder_sec_code":"4809","doc_id":"S100XB3E","period_end":"2025-09-30","holder_table":"reporting","shares":25300,"book_value_yen":30000000,"prior_shares":25300,"prior_book_value_yen":24000000,"purpose_ja":"当社の駐車場運営に最適な駐車場機器の開発を促すために保有しております。なお、日本信号株式会社とは定期的に２社で会議を行っております。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":"無","pct_outstanding":0.04056372092390881,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.1434583014537108,"pct_of_holder_assets":0.06067961165048544,"holder_equity_basis":"parent_only","holder_equity_yen":20912000000,"holder_total_assets_yen":49440000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社ヤシマキザイ","holder_name_en":"Yashima & Co.,Ltd.","holder_sec_code":"7677","doc_id":"S100YJ1S","period_end":"2026-03-31","holder_table":"reporting","shares":18441,"book_value_yen":29506000,"prior_shares":17347,"prior_book_value_yen":15526000,"purpose_ja":"・同社株式は、当社鉄道セグメントの事業活動の円滑化のため保有しております。・当社は保有株式について事業運営上の必要性及び保有の妥当性を取引状況等により検証し、保有リスク・資本コスト等を総合的に勘案して保有意義の有無を定期的に取締役会で精査した上で保有しております。定量的な保有効果については取引先との営業秘密との判断により記載しませんが、上記の方針に基づいた十分な定量的効果があると判断しております。・2025年度において、事業関係のより一層の強化のため保有株数が1,094株増加しております。","reciprocal":"無","pct_outstanding":0.029566623618885467,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.28657625389494484,"pct_of_holder_assets":0.1061992871049821,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":10296038000,"holder_total_assets_yen":27783614000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"協栄産業株式会社","holder_name_en":"KYOEI SANGYO CO.,LTD.","holder_sec_code":"6973","doc_id":"S100W475","period_end":"2025-03-31","holder_table":"reporting","shares":31885,"book_value_yen":28537000,"prior_shares":29797,"prior_book_value_yen":30929000,"purpose_ja":"システム開発事業の取引先であり、取引関係の維持強化のため、同社株式を保有しております。同社に対し、主に鉄道組込ソフト開発の販売を行うなど継続的な取引があり、保有に見合う便益が得られ、当社の企業価値向上につながるものと判断しております。また上記のような目的を踏まえ、取引先持株会に継続加入しており、2,088株増加いたしました。","reciprocal":"無","pct_outstanding":0.05112134760137066,"pct_unavailable":null,"pct_basis_period_end":"2025-03-31","pct_share_classes":1,"pct_of_holder_equity":0.15022830891577138,"pct_of_holder_assets":0.07536641263085826,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":18995754000,"holder_total_assets_yen":37864347000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"西川計測株式会社","holder_name_en":"NISHIKAWA KEISOKU Co., Ltd.","holder_sec_code":"7500","doc_id":"S100Z3XS","period_end":"2026-06-30","holder_table":"reporting","shares":6600,"book_value_yen":10335000,"prior_shares":6600,"prior_book_value_yen":7114000,"purpose_ja":"計測器関連における取引関係強化のため","reciprocal":"無","pct_outstanding":0.010581840241019689,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.04033552286077715,"pct_of_holder_assets":0.024281759760568455,"holder_equity_basis":"parent_only","holder_equity_yen":25622576000,"holder_total_assets_yen":42562813000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"ダイトロン株式会社","holder_name_en":"Daitron Co.,Ltd.","holder_sec_code":"7609","doc_id":"S100XUE0","period_end":"2025-12-31","holder_table":"reporting","shares":4503,"book_value_yen":5899000,"prior_shares":3800,"prior_book_value_yen":3534000,"purpose_ja":"（保有目的）取引関係の維持・強化のため（業務提携等の概要）主に国内販売事業セグメントにおける営業取引（定量的な保有効果）（注）２（株式数が増加した理由）取引先持株会での定期買付","reciprocal":"無","pct_outstanding":0.0072197010008047974,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.01657674366323835,"pct_of_holder_assets":0.007439285173855237,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":35586000000,"holder_total_assets_yen":79295253000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"エレマテック株式会社","holder_name_en":"Elematec Corporation","holder_sec_code":"2715","doc_id":"S100TUNG","period_end":"2024-03-31","holder_table":"reporting","shares":4333,"book_value_yen":4000000,"prior_shares":3894,"prior_book_value_yen":4000000,"purpose_ja":"(保有目的)取引関係の円滑化(定量的な保有効果)（※１）(株式数が増加した理由)（※２）","reciprocal":"無","pct_outstanding":0.00694709389578596,"pct_unavailable":null,"pct_basis_period_end":"2024-03-31","pct_share_classes":1,"pct_of_holder_equity":0.005752995153101584,"pct_of_holder_assets":0.003456410345036163,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":69529000000,"holder_total_assets_yen":115727000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"キヤノンマーケティングジャパン株式会社","holder_name_en":"Canon Marketing Japan Inc.","holder_sec_code":"8060","doc_id":"S100XS8C","period_end":"2025-12-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":168000,"prior_book_value_yen":156000000,"purpose_ja":"当事業年度において保有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":413814000000,"holder_total_assets_yen":564426000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"大同信号株式会社","holder_name_en":"Daido Signal Co., Ltd.","holder_sec_code":"6743","doc_id":"S100YEMV","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":111562,"prior_book_value_yen":99847000,"purpose_ja":"当事業年度において、株式保有状況の見直しを図り、財務体質強化を目的として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":32977146000,"holder_total_assets_yen":50994045000,"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、取引先との営業秘密との判断により記載が困難であります。保有の合理性は取締役会において、保有銘柄ごとに保有目的、含み損益、取引高の推移、取引先の業績、今後の関係等を     検証し、毎年判断しております。"}],"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":4,"acquisition_cost_yen":14000000,"issues_decreased":3,"sale_proceeds_yen":3144000000,"entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","issues_increased":null,"acquisition_cost_yen":null,"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":25195000000,"listed_yen":24640000000,"unlisted_yen":555000000,"listed_issues":29,"unlisted_issues":27,"equity_yen":114336000000,"equity_basis":"jgaap_consolidated","total_assets_yen":172224000000,"assets_basis":"jgaap_consolidated","pct_of_equity":22.03592919115589,"pct_of_assets":14.629203827573393,"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":24640000000,"issue_count":29,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","book_value_yen":555000000,"issue_count":27,"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":19200000000,"equity_yen":86740000000,"equity_basis":"jgaap_consolidated","pct_of_equity":22.13511643993544,"pct_of_assets":14.319168294974867},{"year":"2023","period_end":"2023-03-31","policy_total_yen":19788000000,"equity_yen":89351000000,"equity_basis":"jgaap_consolidated","pct_of_equity":22.146366576759075,"pct_of_assets":13.551661085201241},{"year":"2024","period_end":"2024-03-31","policy_total_yen":24996000000,"equity_yen":96821000000,"equity_basis":"jgaap_consolidated","pct_of_equity":25.816713316326005,"pct_of_assets":15.122054508605826},{"year":"2025","period_end":"2025-03-31","policy_total_yen":24406000000,"equity_yen":102623000000,"equity_basis":"jgaap_consolidated","pct_of_equity":23.78219307562632,"pct_of_assets":14.681183830606352},{"year":"2026","period_end":"2026-03-31","policy_total_yen":25195000000,"equity_yen":114336000000,"equity_basis":"jgaap_consolidated","pct_of_equity":22.03592919115589,"pct_of_assets":14.629203827573393}],"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":39,"book_value_yen":21070000000},{"year":"2022","period_end":"2022-03-31","named_holdings":35,"book_value_yen":18851000000},{"year":"2023","period_end":"2023-03-31","named_holdings":35,"book_value_yen":19242000000},{"year":"2024","period_end":"2024-03-31","named_holdings":34,"book_value_yen":24431000000},{"year":"2025","period_end":"2025-03-31","named_holdings":33,"book_value_yen":23837000000},{"year":"2026","period_end":"2026-03-31","named_holdings":31,"book_value_yen":24627000000}],"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."}}