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LTD.","holder_sec_code":"5906","doc_id":"S100YA6U","period_end":"2026-03-20","holder_table":"reporting","shares":100000,"book_value_yen":103000000,"prior_shares":100000,"prior_book_value_yen":95600000,"purpose_ja":"将来的な企業価値に資する協力関係の維持・強化を目的として保有しております。","reciprocal":"有","pct_outstanding":1.3450496121549442,"pct_unavailable":null,"pct_basis_period_end":"2025-09-30","pct_share_classes":1,"pct_of_holder_equity":0.5310082800688207,"pct_of_holder_assets":0.36358600713482825,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":19397061000,"holder_total_assets_yen":28328923000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"菊水ホールディングス株式会社","holder_name_en":"KIKUSUI HOLDINGS CORPORATION","holder_sec_code":"6912","doc_id":"S100YIEI","period_end":"2026-03-31","holder_table":"reporting","shares":100000,"book_value_yen":100400000,"prior_shares":100000,"prior_book_value_yen":92800000,"purpose_ja":"当社グループと投資先との将来的な事業展開、業務展開等取引関係を構築することを目的として保有しております。(注)１","reciprocal":"有","pct_outstanding":1.3450496121549442,"pct_unavailable":null,"pct_basis_period_end":"2025-09-30","pct_share_classes":1,"pct_of_holder_equity":0.6397451214655516,"pct_of_holder_assets":0.525160826580126,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":15693750000,"holder_total_assets_yen":19117953000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社アイティフォー","holder_name_en":"ITFOR Inc.","holder_sec_code":"4743","doc_id":"S100YAUM","period_end":"2026-03-31","holder_table":"reporting","shares":100000,"book_value_yen":100400000,"prior_shares":100000,"prior_book_value_yen":92800000,"purpose_ja":"取引関係強化のため。","reciprocal":"有","pct_outstanding":1.3450496121549442,"pct_unavailable":null,"pct_basis_period_end":"2025-09-30","pct_share_classes":1,"pct_of_holder_equity":0.4747924686375693,"pct_of_holder_assets":0.35772305003081084,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":21146081000,"holder_total_assets_yen":28066405000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社ＮＳＤ","holder_name_en":"NSD CO.,LTD.","holder_sec_code":"9759","doc_id":"S100YEYZ","period_end":"2026-03-31","holder_table":"reporting","shares":100000,"book_value_yen":100000000,"prior_shares":100000,"prior_book_value_yen":92000000,"purpose_ja":"システム開発におけるコアパートナー企業として株式を取得。安定したシステム開発要員の確保等、協力関係の維持・強化を目的に保有","reciprocal":"有","pct_outstanding":1.3450496121549442,"pct_unavailable":null,"pct_basis_period_end":"2025-09-30","pct_share_classes":1,"pct_of_holder_equity":0.13369162689340766,"pct_of_holder_assets":0.10262515137209828,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":74799000000,"holder_total_assets_yen":97442000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社ＫＳＫ","holder_name_en":"KSK CO.,LTD.","holder_sec_code":"9687","doc_id":"S100YIFE","period_end":"2026-03-31","holder_table":"reporting","shares":100000,"book_value_yen":100000000,"prior_shares":100000,"prior_book_value_yen":92000000,"purpose_ja":"定量的な保有効果については営業秘密等の観点から記載が困難ですが、信頼関係の構築・維持強化の必要性や事業上の取引関係等により当社が実際に得た利益等の保有に伴う便益等が資本コストに見合っているかといった経済合理性の検証等を行い、保有の合理性があると判断しております。","reciprocal":"有","pct_outstanding":1.3450496121549442,"pct_unavailable":null,"pct_basis_period_end":"2025-09-30","pct_share_classes":1,"pct_of_holder_equity":0.5373743887366328,"pct_of_holder_assets":0.38299502106472616,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":18609000000,"holder_total_assets_yen":26110000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社ナカヨ","holder_name_en":"NAKAYO,INC.","holder_sec_code":"6715","doc_id":"S100TSWY","period_end":"2024-03-31","holder_table":"reporting","shares":100000,"book_value_yen":93000000,"prior_shares":100000,"prior_book_value_yen":84000000,"purpose_ja":"保有目的：企業間の関係維持強化による収益拡大のため定量的な保有効果：（注）３","reciprocal":"有","pct_outstanding":1.318518459917698,"pct_unavailable":null,"pct_basis_period_end":"2023-09-30","pct_share_classes":1,"pct_of_holder_equity":0.589204257475925,"pct_of_holder_assets":0.4368863625687039,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":15784000000,"holder_total_assets_yen":21287000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"東京日産コンピュータシステム株式会社","holder_name_en":"TOKYO NISSAN COMPUTER SYSTEM CO.,LTD.","holder_sec_code":"3316","doc_id":"S100QY5R","period_end":"2023-03-31","holder_table":"reporting","shares":100000,"book_value_yen":84800000,"prior_shares":100000,"prior_book_value_yen":82100000,"purpose_ja":"同じＩＴ業界であり、得意分野が異なることから、将来の協業関係構築を想定して保有しておりますが、提出日現在において、協業関係にないことから定量的な保有効果の測定は行っておりません。","reciprocal":"有","pct_outstanding":1.3163662499489908,"pct_unavailable":null,"pct_basis_period_end":"2022-09-30","pct_share_classes":1,"pct_of_holder_equity":2.1387876453738754,"pct_of_holder_assets":1.2169203591637117,"holder_equity_basis":"parent_only","holder_equity_yen":3964863000,"holder_total_assets_yen":6968410000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"川崎地質株式会社","holder_name_en":"Kawasaki Geological Engineering Co.,Ltd.","holder_sec_code":"4673","doc_id":"S100XN3U","period_end":"2025-11-30","holder_table":"reporting","shares":76000,"book_value_yen":81320000,"prior_shares":76000,"prior_book_value_yen":72124000,"purpose_ja":"地質調査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。","reciprocal":"有","pct_outstanding":1.0222377052377576,"pct_unavailable":null,"pct_basis_period_end":"2025-09-30","pct_share_classes":1,"pct_of_holder_equity":1.5494582421765888,"pct_of_holder_assets":0.6801069470683268,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":5248286000,"holder_total_assets_yen":11956943000,"implausible":false,"reciprocal_held_both_ways":true}],"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）当社が株式を保有している株式会社ヨンドシーホールディングスは、当社の株式を保有しておりませんが、グループ傘下の株式会社アスティ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":null,"acquisition_cost_yen":null,"issues_decreased":1,"sale_proceeds_yen":43350000,"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":1972176000,"listed_yen":1972176000,"unlisted_yen":null,"listed_issues":13,"unlisted_issues":null,"equity_yen":6428478000,"equity_basis":"jgaap_consolidated","total_assets_yen":8697912000,"assets_basis":"jgaap_consolidated","pct_of_equity":30.67873919767634,"pct_of_assets":22.674131446719628,"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":1972176000,"issue_count":13,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"listed"}],"scale_history":[{"year":"2021","period_end":"2021-09-30","policy_total_yen":1372479000,"equity_yen":5432313000,"equity_basis":"jgaap_consolidated","pct_of_equity":25.26509426095293,"pct_of_assets":18.474319562564492},{"year":"2022","period_end":"2022-09-30","policy_total_yen":1317579000,"equity_yen":5594017000,"equity_basis":"jgaap_consolidated","pct_of_equity":23.5533606708739,"pct_of_assets":17.205397273940513},{"year":"2023","period_end":"2023-09-30","policy_total_yen":1566409000,"equity_yen":6043376000,"equity_basis":"jgaap_consolidated","pct_of_equity":25.919436420967354,"pct_of_assets":19.159166453842623},{"year":"2024","period_end":"2024-09-30","policy_total_yen":1511694000,"equity_yen":6026242000,"equity_basis":"jgaap_consolidated","pct_of_equity":25.08518575921777,"pct_of_assets":18.63969512504132},{"year":"2025","period_end":"2025-09-30","policy_total_yen":1972176000,"equity_yen":6428478000,"equity_basis":"jgaap_consolidated","pct_of_equity":30.67873919767634,"pct_of_assets":22.674131446719628}],"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":"2019-09-30","named_holdings":21,"book_value_yen":1699623000},{"year":"2021","period_end":"2021-09-30","named_holdings":19,"book_value_yen":1372479000},{"year":"2022","period_end":"2022-09-30","named_holdings":18,"book_value_yen":1317579000},{"year":"2023","period_end":"2023-09-30","named_holdings":17,"book_value_yen":1566409000},{"year":"2024","period_end":"2024-09-30","named_holdings":15,"book_value_yen":1511694000},{"year":"2025","period_end":"2025-09-30","named_holdings":14,"book_value_yen":1972176000}],"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."}}