【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】

2025年6月26日

【事業年度】

第121期(自 2024年4月1日 至 2025年3月31日)

【会社名】

水道機工株式会社

【英訳名】

SUIDO KIKO KAISHA,LTD.

【代表者の役職氏名】

代表取締役社長  古川 徹

【本店の所在の場所】

東京都世田谷区桜丘五丁目48番16号

【電話番号】

東京03(3426)2131(代表)

【事務連絡者氏名】

専務取締役  丸山 広記

【最寄りの連絡場所】

東京都世田谷区桜丘五丁目48番16号

【電話番号】

東京03(3426)2131(代表)

【事務連絡者氏名】

専務取締役  丸山 広記

【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)

 

E01646 64030 水道機工株式会社 SUIDO KIKO KAISHA,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 CTE CTE 2024-04-01 2025-03-31 FY 2025-03-31 2023-04-01 2024-03-31 2024-03-31 1 false false false E01646-000 2024-03-31 jpcrp_cor:Row5Member E01646-000 2023-03-31 jppfs_cor:OtherCapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:OtherCapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:OtherCapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:OtherCapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2025-03-31 jppfs_cor:OtherCapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:TakanosuShigeyukiMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:KokubuKengoMember E01646-000 2023-04-01 2024-03-31 jpcrp_cor:ReportableSegmentsMember E01646-000 2024-04-01 2025-03-31 jpcrp_cor:ReconcilingItemsMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:MurakamiEijiMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:FujimotoHideakiMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:OhkawaKazuhiroMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:TakeuchiSawakoMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E01646-000 2025-03-31 jpcrp_cor:No1MajorShareholdersMember E01646-000 2025-03-31 jpcrp_cor:No2MajorShareholdersMember E01646-000 2025-03-31 jpcrp_cor:No3MajorShareholdersMember E01646-000 2024-03-31 jppfs_cor:ForeignCurrencyTranslationAdjustmentMember E01646-000 2024-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalStockMember E01646-000 2023-03-31 jppfs_cor:LegalCapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalSurplusMember E01646-000 2023-03-31 jppfs_cor:LegalRetainedEarningsMember jppfs_cor:NonConsolidatedMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:GeneralReserveMember E01646-000 2025-03-31 jppfs_cor:LegalRetainedEarningsMember jppfs_cor:NonConsolidatedMember E01646-000 2025-03-31 jppfs_cor:GeneralReserveMember jppfs_cor:NonConsolidatedMember E01646-000 2025-03-31 jppfs_cor:RetainedEarningsBroughtForwardMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jpcrp_cor:DirectorsExcludingAuditAndSupervisoryCommitteeMembersAndOutsideDirectorsMember E01646-000 2024-04-01 2025-03-31 jpcrp_cor:DirectorsAppointedAsAuditAndSupervisoryCommitteeMembersExcludingOutsideDirectorsMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:RetainedEarningsBroughtForwardMember E01646-000 2023-03-31 jppfs_cor:RetainedEarningsMember jppfs_cor:NonConsolidatedMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:TreasuryStockMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ShareholdersEquityMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationAndTranslationAdjustmentsMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalStockMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:LegalCapitalSurplusMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalSurplusMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:LegalRetainedEarningsMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:GeneralReserveMember E01646-000 2025-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2023-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2022-04-01 2023-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2022-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2025-03-31 jpcrp_cor:No5MajorShareholdersMember E01646-000 2025-03-31 jpcrp_cor:No6MajorShareholdersMember E01646-000 2025-03-31 jpcrp_cor:No7MajorShareholdersMember E01646-000 2025-03-31 jpcrp_cor:No8MajorShareholdersMember E01646-000 2025-03-31 jpcrp_cor:No9MajorShareholdersMember E01646-000 2025-03-31 jpcrp_cor:No10MajorShareholdersMember E01646-000 2023-04-01 2024-03-31 jpcrp_cor:ReconcilingItemsMember E01646-000 2025-03-31 jpcrp_cor:No4MajorShareholdersMember E01646-000 2024-04-01 2025-03-31 jpcrp_cor:OutsideDirectorsAndOtherOfficersMember E01646-000 2025-03-31 jpcrp_cor:Row6Member E01646-000 2025-03-31 jpcrp_cor:Row5Member E01646-000 2021-04-01 2022-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:TreasuryStockMember E01646-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ShareholdersEquityMember E01646-000 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E01646-000 2024-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember jppfs_cor:NonConsolidatedMember E01646-000 2025-03-31 jppfs_cor:ShareholdersEquityMember E01646-000 2025-03-31 jppfs_cor:CapitalStockMember E01646-000 2025-03-31 jppfs_cor:CapitalSurplusMember E01646-000 2025-03-31 jppfs_cor:RetainedEarningsMember E01646-000 2025-03-31 jppfs_cor:TreasuryStockMember E01646-000 2025-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E01646-000 2025-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E01646-000 2025-03-31 jppfs_cor:ForeignCurrencyTranslationAdjustmentMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:ShareholdersEquityMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:CapitalStockMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:CapitalSurplusMember E01646-000 2025-03-31 jppfs_cor:TreasuryStockMember jppfs_cor:NonConsolidatedMember E01646-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ValuationAndTranslationAdjustmentsMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:RetainedEarningsBroughtForwardMember jppfs_cor:NonConsolidatedMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:RetainedEarningsMember jppfs_cor:NonConsolidatedMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:TreasuryStockMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ShareholdersEquityMember E01646-000 2021-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2020-04-01 2021-03-31 jppfs_cor:NonConsolidatedMember E01646-000 2023-03-31 jppfs_cor:CapitalStockMember E01646-000 2023-03-31 jppfs_cor:CapitalSurplusMember E01646-000 2023-03-31 jppfs_cor:RetainedEarningsMember E01646-000 2023-03-31 jppfs_cor:TreasuryStockMember E01646-000 2023-03-31 jppfs_cor:ShareholdersEquityMember E01646-000 2023-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E01646-000 2023-03-31 jppfs_cor:ForeignCurrencyTranslationAdjustmentMember E01646-000 2023-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:CapitalStockMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:CapitalSurplusMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:RetainedEarningsMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:TreasuryStockMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:ForeignCurrencyTranslationAdjustmentMember E01646-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ShareholdersEquityMember E01646-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalStockMember E01646-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:CapitalSurplusMember E01646-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:LegalCapitalSurplusMember E01646-000 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:RetainedEarningsMember E01646-000 2025-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:NonConsolidatedMember jppfs_cor:ShareholdersEquityMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:CapitalStockMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:CapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:CapitalStockMember jppfs_cor:NonConsolidatedMember E01646-000 2025-06-26 jpcrp_cor:Row6Member E01646-000 2025-06-26 jpcrp_cor:Row5Member E01646-000 2025-06-26 E01646-000 2025-03-31 E01646-000 2024-04-01 2025-03-31 E01646-000 2024-03-31 E01646-000 2023-04-01 2024-03-31 E01646-000 2023-03-31 E01646-000 2023-04-01 2024-03-31 jppfs_cor:RetainedEarningsMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:TreasuryStockMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:ShareholdersEquityMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:ForeignCurrencyTranslationAdjustmentMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember E01646-000 2024-03-31 jppfs_cor:CapitalStockMember E01646-000 2024-03-31 jppfs_cor:CapitalSurplusMember E01646-000 2024-03-31 jppfs_cor:RetainedEarningsMember E01646-000 2024-03-31 jppfs_cor:TreasuryStockMember E01646-000 2024-03-31 jppfs_cor:ShareholdersEquityMember E01646-000 2024-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:FurukawaToruMember E01646-000 2025-03-31 jpcrp_cor:OrdinaryShareMember E01646-000 2025-03-31 jpcrp_cor:SharesWithNoVotingRightsMember E01646-000 2025-03-31 jpcrp_cor:SharesWithRestrictedVotingRightsTreasurySharesEtcMember E01646-000 2025-03-31 jpcrp_cor:SharesWithRestrictedVotingRightsOtherMember E01646-000 2025-03-31 jpcrp_cor:SharesWithFullVotingRightsTreasurySharesEtcMember E01646-000 2025-03-31 jpcrp_cor:OrdinarySharesSharesWithFullVotingRightsTreasurySharesEtcMember E01646-000 2025-03-31 jpcrp_cor:SharesWithFullVotingRightsOtherMember E01646-000 2025-03-31 jpcrp_cor:OrdinarySharesSharesWithFullVotingRightsOtherMember E01646-000 2025-03-31 jpcrp_cor:SharesLessThanOneUnitMember E01646-000 2025-03-31 jpcrp_cor:OrdinarySharesSharesLessThanOneUnitMember E01646-000 2024-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E01646-000 2022-04-01 2023-03-31 E01646-000 2022-03-31 E01646-000 2021-04-01 2022-03-31 E01646-000 2021-03-31 E01646-000 2020-04-01 2021-03-31 E01646-000 2025-06-26 jpcrp_cor:Row7Member E01646-000 2024-04-01 2025-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E01646-000 2025-06-26 jpcrp_cor:OrdinaryShareMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:LegalCapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:RetainedEarningsMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:LegalRetainedEarningsMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:GeneralReserveMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:RetainedEarningsBroughtForwardMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:TreasuryStockMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember jppfs_cor:NonConsolidatedMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:ValuationDifferenceOnAvailableForSaleSecuritiesMember jppfs_cor:NonConsolidatedMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:ValuationAndTranslationAdjustmentsMember jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:LegalCapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:CapitalSurplusMember jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:LegalRetainedEarningsMember jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:GeneralReserveMember jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:RetainedEarningsBroughtForwardMember jppfs_cor:NonConsolidatedMember E01646-000 2024-03-31 jppfs_cor:RetainedEarningsMember jppfs_cor:NonConsolidatedMember E01646-000 2024-04-01 2025-03-31 jpcrp_cor:ReportableSegmentsMember E01646-000 2023-04-01 2024-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E01646-000 2023-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E01646-000 2025-03-31 jppfs_cor:RemeasurementsOfDefinedBenefitPlansMember E01646-000 2024-03-31 jpcrp_cor:Row1Member E01646-000 2024-03-31 jpcrp_cor:Row2Member E01646-000 2024-03-31 jpcrp_cor:Row3Member E01646-000 2024-03-31 jpcrp_cor:Row4Member E01646-000 2025-03-31 jpcrp_cor:Row4Member E01646-000 2025-06-26 jpcrp_cor:Row1Member E01646-000 2025-06-26 jpcrp_cor:Row2Member E01646-000 2025-06-26 jpcrp_cor:Row3Member E01646-000 2025-03-31 jpcrp_cor:Row1Member E01646-000 2025-03-31 jpcrp_cor:Row2Member E01646-000 2025-03-31 jpcrp_cor:Row3Member E01646-000 2025-06-26 jpcrp_cor:Row4Member E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:MaruyamaHirokiMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:ShibataMunetakaMember E01646-000 2025-06-26 jpcrp030000-asr_E01646-000:SaitoToshihitoMember E01646-000 2024-03-31 jpcrp_cor:Row6Member E01646-000 2024-04-01 2025-03-31 jpcrp030000-asr_E01646-000:PlantConstructionReportableSegmentsMember E01646-000 2024-04-01 2025-03-31 jpcrp030000-asr_E01646-000:OperationAndMaintenanceReportableSegmentsMember E01646-000 2023-04-01 2024-03-31 jpcrp030000-asr_E01646-000:PlantConstructionReportableSegmentsMember E01646-000 2023-04-01 2024-03-31 jpcrp030000-asr_E01646-000:OperationAndMaintenanceReportableSegmentsMember E01646-000 2025-03-31 jpcrp030000-asr_E01646-000:PlantConstructionReportableSegmentsMember E01646-000 2025-03-31 jpcrp030000-asr_E01646-000:OperationAndMaintenanceReportableSegmentsMember xbrli:pure iso4217:JPY iso4217:JPY xbrli:shares xbrli:shares