# 【表紙】

【提出書類】 | 有価証券報告書
【根拠条文】 | 金融商品取引法第24条第１項
【提出先】 | 関東財務局長
【提出日】 | 2026年６月18日
【事業年度】 | 第100期（自　2025年４月１日　至　2026年３月31日）
【会社名】 | 株式会社　イチケン
【英訳名】 | ICHIKEN Co., Ltd.
【代表者の役職氏名】 | 代表取締役社長　政清　弘晃
【本店の所在の場所】 | 東京都港区港南二丁目15番１号
【電話番号】 | ０３（５９３１）５６４２
【事務連絡者氏名】 | 財務経理部長　　高垣　健太郎
【最寄りの連絡場所】 | 東京都港区港南二丁目15番１号
【電話番号】 | ０３（５９３１）５６４２
【事務連絡者氏名】 | 財務経理部長　　高垣　健太郎
【縦覧に供する場所】 | 株式会社東京証券取引所 （東京都中央区日本橋兜町２番１号）

E00117 18470 株式会社　イチケン ICHIKEN Co., Ltd. 企業内容等の開示に関する内閣府令 第三号様式 Japan GAAP true CNS CNS 2025-04-01 2026-03-31 FY 2026-03-31 2024-04-01 2025-03-31 2025-03-31 1 false false false E00117-000 2024-03-31 jppfs_cor:ShareholdersEquityMember E00117-000 2024-03-31 jppfs_cor:CapitalStockMember E00117-000 2024-03-31 jppfs_cor:CapitalSurplusMember E00117-000 2024-03-31 jppfs_cor:RetainedEarningsMember E00117-000 2024-03-31 jppfs_cor:TreasuryStockMember E00117-000 2024-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2024-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E00117-000 2024-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E00117-000 2024-03-31 jppfs_cor:SubscriptionRightsToSharesMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:ShareholdersEquityMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:CapitalStockMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:CapitalSurplusMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:RetainedEarningsMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:TreasuryStockMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:SubscriptionRightsToSharesMember E00117-000 2024-04-01 2025-03-31 jpcrp_cor:ReportableSegmentsMember E00117-000 2024-04-01 2025-03-31 jpcrp030000-asr_E00117-000:CNSReportableSegmentsMember E00117-000 2024-04-01 2025-03-31 jpcrp030000-asr_E00117-000:CTEReportableSegmentsMember E00117-000 2024-04-01 2025-03-31 jpcrp_cor:ReconcilingItemsMember E00117-000 2025-03-31 jpcrp_cor:ReportableSegmentsMember E00117-000 2025-03-31 jpcrp030000-asr_E00117-000:CNSReportableSegmentsMember E00117-000 2025-03-31 jpcrp030000-asr_E00117-000:CTEReportableSegmentsMember E00117-000 2025-03-31 jpcrp_cor:ReconcilingItemsMember E00117-000 2024-04-01 2025-03-31 jpcrp_cor:UnallocatedAmountsAndEliminationMember E00117-000 2025-03-31 jpcrp_cor:UnallocatedAmountsAndEliminationMember E00117-000 2025-04-01 2026-03-31 jpcrp_cor:DirectorsExcludingAuditAndSupervisoryCommitteeMembersAndOutsideDirectorsMember E00117-000 2025-04-01 2026-03-31 jpcrp_cor:DirectorsAppointedAsAuditAndSupervisoryCommitteeMembersExcludingOutsideDirectorsMember E00117-000 2025-04-01 2026-03-31 jpcrp_cor:OutsideDirectorsAndOtherOfficersMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:SubscriptionRightsToSharesMember E00117-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalStockMember E00117-000 2025-03-31 jppfs_cor:LegalCapitalSurplusMember jppfs_cor:NonConsolidatedMember E00117-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalSurplusMember E00117-000 2025-03-31 jppfs_cor:LegalRetainedEarningsMember jppfs_cor:NonConsolidatedMember E00117-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:RetainedEarningsBroughtForwardMember E00117-000 2025-03-31 jppfs_cor:RetainedEarningsMember jppfs_cor:NonConsolidatedMember E00117-000 2025-03-31 jppfs_cor:TreasuryStockMember jppfs_cor:NonConsolidatedMember E00117-000 2025-03-31 jppfs_cor:ShareholdersEquityMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jpcrp_cor:CorporateSharedMember jppfs_cor:NonConsolidatedMember E00117-000 2026-06-18 jpcrp_cor:OrdinaryShareMember E00117-000 2026-03-31 jpcrp_cor:OrdinaryShareMember E00117-000 2026-03-31 jpcrp_cor:SharesWithNoVotingRightsMember E00117-000 2026-03-31 jpcrp_cor:OrdinarySharesSharesLessThanOneUnitMember E00117-000 2026-03-31 jpcrp_cor:Row1Member E00117-000 2026-03-31 jpcrp_cor:Row2Member E00117-000 2026-03-31 jpcrp_cor:Row3Member E00117-000 2026-03-31 jpcrp_cor:Row4Member E00117-000 2025-03-31 jpcrp_cor:Row1Member E00117-000 2025-03-31 jpcrp_cor:Row2Member E00117-000 2025-03-31 jpcrp_cor:Row3Member E00117-000 2025-03-31 jpcrp_cor:Row4Member E00117-000 2026-06-18 jpcrp_cor:Row1Member E00117-000 2026-06-18 jpcrp_cor:Row2Member E00117-000 2026-06-18 jpcrp_cor:Row3Member E00117-000 2026-06-18 jpcrp_cor:Row4Member E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:HiroyukiHasegawaMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:HideakiTakeuchiMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:ShunjiIchijiMember E00117-000 2026-03-31 jpcrp_cor:ReconcilingItemsMember E00117-000 2025-04-01 2026-03-31 jpcrp_cor:UnallocatedAmountsAndEliminationMember E00117-000 2026-03-31 jpcrp_cor:UnallocatedAmountsAndEliminationMember E00117-000 2026-03-31 jpcrp030000-asr_E00117-000:CTEReportableSegmentsMember E00117-000 2026-03-31 jpcrp030000-asr_E00117-000:CNSReportableSegmentsMember E00117-000 2025-04-01 2026-03-31 jpcrp030000-asr_E00117-000:CNSReportableSegmentsMember E00117-000 2025-04-01 2026-03-31 jpcrp030000-asr_E00117-000:CTEReportableSegmentsMember E00117-000 2026-03-31 jpcrp030000-asr_E00117-000:CNSReportableSegmentsMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jpcrp_cor:ReportableSegmentsMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jpcrp030000-asr_E00117-000:CTEReportableSegmentsMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2025-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2026-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:SubscriptionRightsToSharesMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ShareholdersEquityMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalStockMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalSurplusMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:LegalCapitalSurplusMember jppfs_cor:NonConsolidatedMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:KotaniMitsuruMember E00117-000 2026-03-31 jpcrp_cor:SharesWithRestrictedVotingRightsOtherMember E00117-000 2026-03-31 jpcrp_cor:SharesWithFullVotingRightsTreasurySharesEtcMember E00117-000 2026-03-31 jpcrp_cor:OrdinarySharesSharesWithFullVotingRightsTreasurySharesEtcMember E00117-000 2026-03-31 jpcrp_cor:SharesWithFullVotingRightsOtherMember E00117-000 2026-03-31 jpcrp_cor:OrdinarySharesSharesWithFullVotingRightsOtherMember E00117-000 2026-03-31 jpcrp_cor:SharesLessThanOneUnitMember E00117-000 2026-03-31 jppfs_cor:CapitalStockMember E00117-000 2026-03-31 jppfs_cor:CapitalSurplusMember E00117-000 2026-03-31 jppfs_cor:RetainedEarningsMember E00117-000 2026-03-31 jppfs_cor:TreasuryStockMember E00117-000 2026-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2026-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E00117-000 2026-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E00117-000 2026-03-31 jppfs_cor:SubscriptionRightsToSharesMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:ShareholdersEquityMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:CapitalStockMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:CapitalSurplusMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:RetainedEarningsMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:TreasuryStockMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:RetainedEarningsMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:SubscriptionRightsToSharesMember E00117-000 2025-04-01 2026-03-31 jpcrp_cor:ReportableSegmentsMember E00117-000 2025-04-01 2026-03-31 jpcrp_cor:ReconcilingItemsMember E00117-000 2026-03-31 jpcrp_cor:No2MajorShareholdersMember E00117-000 2026-03-31 jpcrp_cor:No3MajorShareholdersMember E00117-000 2026-03-31 jpcrp_cor:No4MajorShareholdersMember E00117-000 2026-03-31 jpcrp_cor:No5MajorShareholdersMember E00117-000 2026-03-31 jpcrp_cor:No6MajorShareholdersMember E00117-000 2026-03-31 jpcrp_cor:No7MajorShareholdersMember E00117-000 2026-03-31 jpcrp_cor:No8MajorShareholdersMember E00117-000 2026-03-31 jpcrp_cor:No9MajorShareholdersMember E00117-000 2026-03-31 jpcrp_cor:No10MajorShareholdersMember E00117-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2023-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2022-04-01 2023-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2022-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2021-04-01 2022-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2024-03-31 jppfs_cor:TreasuryStockMember jppfs_cor:NonConsolidatedMember E00117-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ShareholdersEquityMember E00117-000 2024-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember jppfs_cor:NonConsolidatedMember E00117-000 2024-03-31 jppfs_cor:SubscriptionRightsToSharesMember jppfs_cor:NonConsolidatedMember E00117-000 2024-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember jppfs_cor:NonConsolidatedMember E00117-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalStockMember E00117-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:LegalCapitalSurplusMember E00117-000 2024-03-31 jppfs_cor:CapitalSurplusMember jppfs_cor:NonConsolidatedMember E00117-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:LegalRetainedEarningsMember E00117-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:RetainedEarningsBroughtForwardMember E00117-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:RetainedEarningsMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalStockMember E00117-000 2026-03-31 jpcrp_cor:No1MajorShareholdersMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:LegalCapitalSurplusMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalSurplusMember E00117-000 2026-03-31 jppfs_cor:RetainedEarningsMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:LegalRetainedEarningsMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:RetainedEarningsBroughtForwardMember E00117-000 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:TreasuryStockMember E00117-000 2025-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember jppfs_cor:NonConsolidatedMember E00117-000 2024-03-31 jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jpcrp_cor:ReportableSegmentsMember E00117-000 2026-03-31 jpcrp_cor:CorporateSharedMember E00117-000 2025-03-31 jppfs_cor:ShareholdersEquityMember E00117-000 2025-03-31 jppfs_cor:CapitalStockMember E00117-000 2025-03-31 jppfs_cor:CapitalSurplusMember E00117-000 2025-03-31 jppfs_cor:RetainedEarningsMember E00117-000 2025-03-31 jppfs_cor:TreasuryStockMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:LegalRetainedEarningsMember jppfs_cor:NonConsolidatedMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:RetainedEarningsBroughtForwardMember jppfs_cor:NonConsolidatedMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:RetainedEarningsMember jppfs_cor:NonConsolidatedMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:TreasuryStockMember jppfs_cor:NonConsolidatedMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ShareholdersEquityMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E00117-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2025-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2025-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E00117-000 2025-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E00117-000 2025-03-31 jppfs_cor:SubscriptionRightsToSharesMember E00117-000 2026-03-31 jppfs_cor:ShareholdersEquityMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:RetainedEarningsBroughtForwardMember jppfs_cor:NonConsolidatedMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:TreasuryStockMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationAndTranslationAdjustmentsMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:SubscriptionRightsToSharesMember E00117-000 2025-03-31 jppfs_cor:SubscriptionRightsToSharesMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:ShareholdersEquityMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:CapitalStockMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:CapitalSurplusMember jppfs_cor:NonConsolidatedMember E00117-000 2026-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:LegalCapitalSurplusMember E00117-000 2026-03-31 jpcrp_cor:Row5Member E00117-000 2026-03-31 jpcrp_cor:Row6Member E00117-000 2026-03-31 jpcrp_cor:SharesWithRestrictedVotingRightsTreasurySharesEtcMember E00117-000 2025-03-31 jpcrp_cor:Row5Member E00117-000 2025-03-31 jpcrp_cor:Row6Member E00117-000 2026-06-18 jpcrp_cor:Row6Member E00117-000 2026-06-18 jpcrp_cor:Row5Member E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:HatsuseTakashiMember E00117-000 2025-04-01 2026-03-31 jppfs_cor:LegalRetainedEarningsMember jppfs_cor:NonConsolidatedMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:InoueAkikoMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:IsonoKeijiMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:YuasaShirouMember E00117-000 2026-06-18 E00117-000 2026-03-31 E00117-000 2025-04-01 2026-03-31 E00117-000 2025-03-31 E00117-000 2024-04-01 2025-03-31 E00117-000 2024-03-31 E00117-000 2023-04-01 2024-03-31 E00117-000 2023-03-31 E00117-000 2022-04-01 2023-03-31 E00117-000 2022-03-31 E00117-000 2021-04-01 2022-03-31 E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:HirotakeKubotaMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:MasakiyoHiroakiMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:KidoSumihitoMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:OtashiroMitsuhideMember E00117-000 2026-06-18 jpcrp030000-asr_E00117-000:YoshidaMitsuoMember iso4217:JPY xbrli:shares iso4217:JPY xbrli:shares xbrli:pure