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Inc.","holder_sec_code":"7186","doc_id":"S100YDG1","period_end":"2026-03-31","holder_table":"largest","shares":1286700,"book_value_yen":784000000,"prior_shares":3124000,"prior_book_value_yen":1527000000,"purpose_ja":"鉄道信号システムや道路交通管制システム等を中心に社会インフラの安全性・信頼性を支える製品・サービスを提供する企業であり、公共性の高い分野における長年の事業実績を通じて、安定的な事業基盤を構築している。同社とは、政策保有株式の縮減に向けた考え方について認識を共有している。","reciprocal":"無","pct_outstanding":2.086784716912254,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.05527573000626082,"pct_of_holder_assets":0.003054089800212664,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":1418344000000,"holder_total_assets_yen":25670496000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社きんでん","holder_name_en":"ＫＩＮＤＥＮ　ＣＯＲＰＯＲＡＴＩＯＮ","holder_sec_code":"1944","doc_id":"S100YFY8","period_end":"2026-03-31","holder_table":"reporting","shares":327000,"book_value_yen":199000000,"prior_shares":null,"prior_book_value_yen":null,"purpose_ja":"保有先企業は、当社が設備工事を請け負っている重要顧客の一つであり、関係強化により中長期的な工事受注獲得による収益を維持向上させるため保有している。","reciprocal":"無","pct_outstanding":0.5303323248856043,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.030065191608940996,"pct_of_holder_assets":0.02177807593435059,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":661895000000,"holder_total_assets_yen":913763000000,"implausible":false,"reciprocal_held_both_ways":false},{"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":266343,"book_value_yen":162000000,"prior_shares":266343,"prior_book_value_yen":130000000,"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":0.4319581113364113,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.02819661745022514,"pct_of_holder_assets":0.009360623209491903,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":574537000000,"holder_total_assets_yen":1730654000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社ＮＡＮＫＡＩ","holder_name_en":"NANKAI Co.,Ltd.","holder_sec_code":"9044","doc_id":"S100YBA0","period_end":"2026-03-31","holder_table":"reporting","shares":260452,"book_value_yen":158000000,"prior_shares":260452,"prior_book_value_yen":127000000,"purpose_ja":"(保有目的)鉄道事業における信号設備等の主要な調達先であり、設備更新および保守における鉄道保安装置の安定供給体制確保のため","reciprocal":"有","pct_outstanding":0.42240402043151504,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.04462205402657554,"pct_of_holder_assets":0.014834287860294807,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":354085000000,"holder_total_assets_yen":1065100000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"日本リーテック株式会社","holder_name_en":"NIPPON RIETEC CO.,LTD.","holder_sec_code":"1938","doc_id":"S100YI6M","period_end":"2026-03-31","holder_table":"reporting","shares":225225,"book_value_yen":137387000,"prior_shares":225225,"prior_book_value_yen":110135000,"purpose_ja":"鉄道電気設備工事において必要不可欠な資材を安定調達するため","reciprocal":"無","pct_outstanding":0.36527247055767653,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.1983366068466414,"pct_of_holder_assets":0.1355762958671537,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":69269613000,"holder_total_assets_yen":101335561000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"京福電気鉄道株式会社","holder_name_en":"Keifuku Electric Railroad Co.,Ltd.","holder_sec_code":"9049","doc_id":"S100YEN3","period_end":"2026-03-31","holder_table":"reporting","shares":193190,"book_value_yen":117000000,"prior_shares":193190,"prior_book_value_yen":94000000,"purpose_ja":"安全輸送設備に関する取引会社である同社との関係を維持するため","reciprocal":"有","pct_outstanding":0.31331774264418927,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.7442748091603053,"pct_of_holder_assets":0.43953567001014315,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":15720000000,"holder_total_assets_yen":26619000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"サンワテクノス株式会社","holder_name_en":"SUN-WA TECHNOS CORPORATION","holder_sec_code":"8137","doc_id":"S100YJ4F","period_end":"2026-03-31","holder_table":"reporting","shares":75130,"book_value_yen":45000000,"prior_shares":70835,"prior_book_value_yen":34000000,"purpose_ja":"制御・電子部門事業における取引先であり、取引関係の維持・強化のために保有企業持株会の買付のため株式数増加","reciprocal":"無","pct_outstanding":0.121846689812402,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.084707476846623,"pct_of_holder_assets":0.044384826307379714,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":53124000000,"holder_total_assets_yen":101386000000,"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":88643,"book_value_yen":42000000,"prior_shares":85760,"prior_book_value_yen":50000000,"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":0.14147962601931033,"pct_unavailable":null,"pct_basis_period_end":"2025-03-31","pct_share_classes":1,"pct_of_holder_equity":0.12610340479192939,"pct_of_holder_assets":0.053063802905874924,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":33306000000,"holder_total_assets_yen":79150000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"京阪ホールディングス株式会社","holder_name_en":"Keihan Holdings Co.,Ltd.","holder_sec_code":"9045","doc_id":"S100YCVR","period_end":"2026-03-31","holder_table":"reporting","shares":65650,"book_value_yen":40000000,"prior_shares":65650,"prior_book_value_yen":32000000,"purpose_ja":"信号保安装置をはじめとする鉄道事業における長期的な関係維持・強化のため","reciprocal":"有","pct_outstanding":0.10647191782489274,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.01144285865494918,"pct_of_holder_assets":0.004397803297253022,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":349563000000,"holder_total_assets_yen":909545000000,"implausible":false,"reciprocal_held_both_ways":true},{"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":60668,"book_value_yen":37007000,"prior_shares":58373,"prior_book_value_yen":28544000,"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2,295株増加しております。","reciprocal":"無","pct_outstanding":0.09839205347449494,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.3594295203650181,"pct_of_holder_assets":0.13319721473239587,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":10296038000,"holder_total_assets_yen":27783614000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"西日本鉄道株式会社","holder_name_en":"Nishi-Nippon Railroad Co.，Ltd.","holder_sec_code":"9031","doc_id":"S100YAAB","period_end":"2026-03-31","holder_table":"reporting","shares":34650,"book_value_yen":21000000,"prior_shares":34650,"prior_book_value_yen":16000000,"purpose_ja":"　鉄道運行上必要なシステムの調達先であり、取引関係の維持・向上を通じた、当社グループの中長期的な企業価値向上に資するため","reciprocal":"有","pct_outstanding":0.05619576470118101,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.007166159348084246,"pct_of_holder_assets":0.00255832057218667,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":293044000000,"holder_total_assets_yen":820851000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"新京成電鉄株式会社","holder_name_en":"Shin-Keisei Electric Railway Co.,Ltd.","holder_sec_code":"9014","doc_id":"S100OJ1Q","period_end":"2022-03-31","holder_table":"reporting","shares":46200,"book_value_yen":20189000,"prior_shares":46200,"prior_book_value_yen":19034000,"purpose_ja":"同上（注）","reciprocal":"有","pct_outstanding":0.073737895712941,"pct_unavailable":null,"pct_basis_period_end":"2022-03-31","pct_share_classes":1,"pct_of_holder_equity":0.046345325912388165,"pct_of_holder_assets":0.029641783836061746,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":43562106000,"holder_total_assets_yen":68109936000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"東急建設株式会社","holder_name_en":"TOKYU CONSTRUCTION CO., LTD.","holder_sec_code":"1720","doc_id":"S100YFDZ","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":313000,"prior_book_value_yen":153000000,"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、保有しておりました。なお、当事業年度におい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":112676000000,"holder_total_assets_yen":310849000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"日本航空電子工業株式会社","holder_name_en":"Japan Aviation Electronics Industry, Limited","holder_sec_code":"6807","doc_id":"S100YF73","period_end":"2026-03-31","holder_table":"reporting","shares":null,"book_value_yen":null,"prior_shares":100000,"prior_book_value_yen":48000000,"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":144362000000,"holder_total_assets_yen":232142000000,"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":null,"book_value_yen":null,"prior_shares":79600,"prior_book_value_yen":38000000,"purpose_ja":"当事業年度におい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":53541000000,"holder_total_assets_yen":80796000000,"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記載が困難であります。保有の合理性は、「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」に記載した内容に従い、2025年３月31日を算定基準日として取締役会で検証しております。"},{"holder_table":"reporting","note_no":"2","text_ja":"２　「―」は、当該銘柄を保有していないことを示しております。"},{"holder_table":"reporting","note_no":"3","text_ja":"３　株式会社西武ホールディングス傘下の西武鉄道株式会社は当社の株式を保有しております。"}],"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":2,"acquisition_cost_yen":21000000,"issues_decreased":8,"sale_proceeds_yen":428000000,"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":9632000000,"listed_yen":9176000000,"unlisted_yen":456000000,"listed_issues":14,"unlisted_issues":26,"equity_yen":55668000000,"equity_basis":"jgaap_consolidated","total_assets_yen":119208000000,"assets_basis":"jgaap_consolidated","pct_of_equity":17.302579578932242,"pct_of_assets":8.079994631232804,"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":9176000000,"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":456000000,"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":12460000000,"equity_yen":44956000000,"equity_basis":"jgaap_consolidated","pct_of_equity":27.715988966989947,"pct_of_assets":11.038368518502113},{"year":"2023","period_end":"2023-03-31","policy_total_yen":12388000000,"equity_yen":46245000000,"equity_basis":"jgaap_consolidated","pct_of_equity":26.78776083900962,"pct_of_assets":10.832458901713887},{"year":"2024","period_end":"2024-03-31","policy_total_yen":11785000000,"equity_yen":49647000000,"equity_basis":"jgaap_consolidated","pct_of_equity":23.737587366809677,"pct_of_assets":9.095961038259379},{"year":"2025","period_end":"2025-03-31","policy_total_yen":9583000000,"equity_yen":51711000000,"equity_basis":"jgaap_consolidated","pct_of_equity":18.531840420800215,"pct_of_assets":7.605253759771438},{"year":"2026","period_end":"2026-03-31","policy_total_yen":9632000000,"equity_yen":55668000000,"equity_basis":"jgaap_consolidated","pct_of_equity":17.302579578932242,"pct_of_assets":8.079994631232804}],"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":41,"book_value_yen":15714000000},{"year":"2022","period_end":"2022-03-31","named_holdings":34,"book_value_yen":11993000000},{"year":"2023","period_end":"2023-03-31","named_holdings":34,"book_value_yen":11924000000},{"year":"2024","period_end":"2024-03-31","named_holdings":29,"book_value_yen":11312000000},{"year":"2025","period_end":"2025-03-31","named_holdings":21,"book_value_yen":9116000000},{"year":"2026","period_end":"2026-03-31","named_holdings":18,"book_value_yen":9170000000}],"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."}}