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Ltd.","holder_sec_code":"4112","doc_id":"S100YGIX","period_end":"2026-03-31","holder_table":"reporting","shares":47800,"book_value_yen":221553000,"prior_shares":47800,"prior_book_value_yen":198848000,"purpose_ja":"（保有目的）基礎化学品セグメント及び機能性樹脂セグメント等における取引の円滑化の為（定量的な保有効果）（注１）","reciprocal":"有","pct_outstanding":0.3451753761707529,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.3482825837486048,"pct_of_holder_assets":0.2563885063589969,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":63613000000,"holder_total_assets_yen":86413000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"日本金属株式会社","holder_name_en":"NIPPON KINZOKU CO., LTD.","holder_sec_code":"5491","doc_id":"S100YJG2","period_end":"2026-03-31","holder_table":"reporting","shares":46000,"book_value_yen":213000000,"prior_shares":46000,"prior_book_value_yen":191000000,"purpose_ja":"購買取引先として事業上の関係を維持・強化するために保有しております。(注)１","reciprocal":"有","pct_outstanding":0.3321771402480049,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.7296019730081523,"pct_of_holder_assets":0.32421571761267637,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":29194000000,"holder_total_assets_yen":65697000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"株式会社ＵＥＸ","holder_name_en":"ＵＥＸ，ＬＴＤ.","holder_sec_code":"9888","doc_id":"S100YDU2","period_end":"2026-03-31","holder_table":"reporting","shares":43056,"book_value_yen":199564000,"prior_shares":40646,"prior_book_value_yen":169087000,"purpose_ja":"保有目的は、取引先との関係強化の為であります。また、取引先持株会における継続買付のため株式数が増加しております。","reciprocal":"無","pct_outstanding":0.3109178032721326,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":1.0503286053177794,"pct_of_holder_assets":0.3827265814948963,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":19000149000,"holder_total_assets_yen":52142707000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"日本酸素ホールディングス株式会社","holder_name_en":"NIPPON SANSO HOLDINGS CORPORATION","holder_sec_code":"4091","doc_id":"S100YB9P","period_end":"2026-03-31","holder_table":"reporting","shares":41750,"book_value_yen":193000000,"prior_shares":41750,"prior_book_value_yen":173000000,"purpose_ja":"アルゴン及び窒素の主要販売先であり、取引の円滑化を図るために保有しております。","reciprocal":"有","pct_outstanding":0.30148686098596095,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.015854018172154923,"pct_of_holder_assets":0.006973352039741603,"holder_equity_basis":"ifrs_consolidated_excl_nci","holder_equity_yen":1217357000000,"holder_total_assets_yen":2767679000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"山九株式会社","holder_name_en":"SANKYU INC.","holder_sec_code":"9065","doc_id":"S100YJRS","period_end":"2026-03-31","holder_table":"reporting","shares":24490,"book_value_yen":113000000,"prior_shares":23405,"prior_book_value_yen":97000000,"purpose_ja":"主に物流事業に関する取引を行っており、事業上の関係を勘案し、良好な関係維持・強化を図ることを目的として、同社株式を継続して保有しております。また、当社は同社の持株会に加入しており、当事業年度において株式を1,085株取得しております。","reciprocal":"無","pct_outstanding":0.1768482209711661,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.03680925638787184,"pct_of_holder_assets":0.020187728005202358,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":306988000000,"holder_total_assets_yen":559746000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"日本酸素ホールディングス株式会社","holder_name_en":"NIPPON SANSO HOLDINGS CORPORATION","holder_sec_code":"4091","doc_id":"S100YB9P","period_end":"2026-03-31","holder_table":"second_largest","shares":18827,"book_value_yen":87000000,"prior_shares":17595,"prior_book_value_yen":73000000,"purpose_ja":"アルゴン及び窒素の主要販売先であり、取引の円滑化を図るために保有しております。取引先持株会を通じた保有であり、定期購入等により株式数が増加しております。","reciprocal":"有","pct_outstanding":0.13595432650976497,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.007146629953251183,"pct_of_holder_assets":0.0031434281215415518,"holder_equity_basis":"ifrs_consolidated_excl_nci","holder_equity_yen":1217357000000,"holder_total_assets_yen":2767679000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"モリ工業株式会社","holder_name_en":"MORY INDUSTRIES INC.","holder_sec_code":"5464","doc_id":"S100YEUF","period_end":"2026-03-31","holder_table":"reporting","shares":17750,"book_value_yen":82000000,"prior_shares":17750,"prior_book_value_yen":73000000,"purpose_ja":"当社の主原材料の調達先である発行会社との取引関係の維持・強化を図るため。","reciprocal":"有","pct_outstanding":0.12817704868265406,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.1400416709362298,"pct_of_holder_assets":0.11285594351697656,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":58554000000,"holder_total_assets_yen":72659000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"飯野海運株式会社","holder_name_en":"IINO KAIUN KAISHA, LTD.","holder_sec_code":"9119","doc_id":"S100YGFN","period_end":"2026-03-31","holder_table":"reporting","shares":17230,"book_value_yen":80000000,"prior_shares":17230,"prior_book_value_yen":72000000,"purpose_ja":"海運業における取引先として、取引関係を推進するため","reciprocal":"有","pct_outstanding":0.12442200274941574,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.0505401478299324,"pct_of_holder_assets":0.023075769288458656,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":158290000000,"holder_total_assets_yen":346684000000,"implausible":false,"reciprocal_held_both_ways":true},{"holder_name":"ＳＥＣカーボン株式会社","holder_name_en":"SEC CARBON,LIMITED","holder_sec_code":"5304","doc_id":"S100YDCX","period_end":"2026-03-31","holder_table":"reporting","shares":14191,"book_value_yen":65000000,"prior_shares":13307,"prior_book_value_yen":55000000,"purpose_ja":"販売取引先との関係の維持強化 持株会による定期購入","reciprocal":"無","pct_outstanding":0.10247664776650951,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.08373267377750296,"pct_of_holder_assets":0.07469890594833134,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":77628000000,"holder_total_assets_yen":87016000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"白銅株式会社","holder_name_en":"Hakudo Co., Ltd.","holder_sec_code":"7637","doc_id":"S100YI9D","period_end":"2026-03-31","holder_table":"reporting","shares":4798,"book_value_yen":22240000,"prior_shares":4051,"prior_book_value_yen":16855000,"purpose_ja":"　仕入等営業上の　取引関係強化のため　持株会による株式配分","reciprocal":"無","pct_outstanding":0.03464751997630277,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.08733397414898658,"pct_of_holder_assets":0.04675770824157168,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":25465462000,"holder_total_assets_yen":47564350000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"黒崎播磨株式会社","holder_name_en":"KROSAKI HARIMA CORPORATION","holder_sec_code":"5352","doc_id":"S100W08P","period_end":"2025-03-31","holder_table":"reporting","shares":3991,"book_value_yen":16000000,"prior_shares":3833,"prior_book_value_yen":18000000,"purpose_ja":"同社は当社の取引先であり、主として耐火物製造事業において営業上の取引関係の維持強化を目的として同社株式を保有しております。株式数の増加は取引先持株会を通じた取得によるものです。","reciprocal":"無","pct_outstanding":0.028348526775151574,"pct_unavailable":null,"pct_basis_period_end":"2025-03-31","pct_share_classes":1,"pct_of_holder_equity":0.015741833923652106,"pct_of_holder_assets":0.008553496776400903,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":101640000000,"holder_total_assets_yen":187058000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"株式会社　ヨータイ","holder_name_en":"YOTAI REFRACTORIES CO.,LTD.","holder_sec_code":"5357","doc_id":"S100YHT7","period_end":"2026-03-31","holder_table":"reporting","shares":1859,"book_value_yen":8619000,"prior_shares":1511,"prior_book_value_yen":6289000,"purpose_ja":"同社は合金鉄メーカーであり、当社グループの取引先のひとつでもあります。主に当社グループの耐火物等事業における販路拡大及び株式保有の合理性を検証し、総合的に勘案した上で、同社株式を保有しております。また持株会を通じた株式の取得を行っております。 ","reciprocal":"無","pct_outstanding":0.013424289211326981,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.025037037037037038,"pct_of_holder_assets":0.020407728370507174,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":34425000000,"holder_total_assets_yen":42234000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"東京窯業株式会社","holder_name_en":"TYK CORPORATION","holder_sec_code":"5363","doc_id":"S100YI3M","period_end":"2026-03-31","holder_table":"reporting","shares":5,"book_value_yen":23000,"prior_shares":5,"prior_book_value_yen":20000,"purpose_ja":"取引及び協力関係の維持・発展による企業価値の向上のため","reciprocal":"無","pct_outstanding":3.6106210896522274e-05,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":4.2580764602425254e-05,"pct_of_holder_assets":3.433143266561185e-05,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":54015000000,"holder_total_assets_yen":66994000000,"implausible":false,"reciprocal_held_both_ways":false},{"holder_name":"太平洋興発株式会社","holder_name_en":"TAIHEIYO KOUHATSU INCORPORATED","holder_sec_code":"8835","doc_id":"S100YL7T","period_end":"2026-03-31","holder_table":"reporting","shares":162,"book_value_yen":0,"prior_shares":129,"prior_book_value_yen":0,"purpose_ja":"当該企業グループは、過去に商事セグメントの輸入炭の販売先としての経験があり、毎期定期的な取引を行っておりました。今後、将来的に取引が再開される可能性を考慮し、保有を継続しております。なお、株式数が増加した理由は、取引先持株会を通じた株式の取得であります。","reciprocal":"無","pct_outstanding":0.0011698412330473217,"pct_unavailable":null,"pct_basis_period_end":"2026-03-31","pct_share_classes":1,"pct_of_holder_equity":0.0,"pct_of_holder_assets":0.0,"holder_equity_basis":"jgaap_consolidated","holder_equity_yen":16499000000,"holder_total_assets_yen":45689000000,"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． 保有効果については、当該株式の発行会社との安定的な取引関係の維持やさらなる連携強化など多岐且つ総合的なものであるため定量的な保有効果の記載は困難であり、また、定量的な保有効果は個別の取引条件その他の取引関係における営業秘密にあたることを考慮し、記載しておりません。保有の合理性については、2025年10月31日開催の取締役会において、当該株式の保有目的、当該株式の発行会社との現在の取引関係又は協業関係、将来における事業上の連携等の見込みや、当該株式の「時価」、「配当」等を踏まえ、資本コストも参考にし、検証を行っております。"},{"holder_table":"reporting","note_no":"2","text_ja":"２． みなし保有株式は保有しておりません。"}],"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":10000000,"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":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":6272000000,"listed_yen":5880000000,"unlisted_yen":392000000,"listed_issues":12,"unlisted_issues":15,"equity_yen":101308000000,"equity_basis":"jgaap_consolidated","total_assets_yen":219411000000,"assets_basis":"jgaap_consolidated","pct_of_equity":6.191021439570419,"pct_of_assets":2.8585622416378396,"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":5880000000,"issue_count":12,"holder_table_label":"The filer itself","entity_scope":"parent_only","share_scope":"listed"},{"holder_table":"reporting","share_class":"unlisted","book_value_yen":392000000,"issue_count":15,"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":2612000000,"equity_yen":51131000000,"equity_basis":"jgaap_consolidated","pct_of_equity":5.108446930433592,"pct_of_assets":1.6472428232682508},{"year":"2022","period_end":"2022-03-31","policy_total_yen":3036000000,"equity_yen":62169000000,"equity_basis":"jgaap_consolidated","pct_of_equity":4.8834628190899005,"pct_of_assets":1.619251816058114},{"year":"2023","period_end":"2023-03-31","policy_total_yen":3098000000,"equity_yen":79619000000,"equity_basis":"jgaap_consolidated","pct_of_equity":3.891031035305643,"pct_of_assets":1.3936498510980952},{"year":"2024","period_end":"2024-03-31","policy_total_yen":4843000000,"equity_yen":89738000000,"equity_basis":"jgaap_consolidated","pct_of_equity":5.396821859190086,"pct_of_assets":2.2014837172936708},{"year":"2025","period_end":"2025-03-31","policy_total_yen":4671000000,"equity_yen":96606000000,"equity_basis":"jgaap_consolidated","pct_of_equity":4.835103409726104,"pct_of_assets":2.1479713603818618},{"year":"2026","period_end":"2026-03-31","policy_total_yen":6272000000,"equity_yen":101308000000,"equity_basis":"jgaap_consolidated","pct_of_equity":6.191021439570419,"pct_of_assets":2.8585622416378396}],"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":"2020","period_end":"2020-03-31","named_holdings":15,"book_value_yen":1960000000},{"year":"2022","period_end":"2022-03-31","named_holdings":16,"book_value_yen":2642000000},{"year":"2023","period_end":"2023-03-31","named_holdings":14,"book_value_yen":2704000000},{"year":"2024","period_end":"2024-03-31","named_holdings":12,"book_value_yen":4449000000},{"year":"2025","period_end":"2025-03-31","named_holdings":12,"book_value_yen":4279000000},{"year":"2026","period_end":"2026-03-31","named_holdings":12,"book_value_yen":5881000000}],"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."}}