E0451095130電源開発株式会社Electric Power Development Co., Ltd.企業内容等の開示に関する内閣府令第四号の三様式Japan GAAPtruecte2021-04-012021-09-30Q22022-03-312020-04-012020-09-302021-03-311falsefalsefalseE04510-0002021-11-01E04510-0002020-04-012020-09-30E04510-0002020-04-012021-03-31E04510-0002021-04-012021-09-30E04510-0002020-09-30E04510-0002021-03-31E04510-0002021-09-30E04510-0002020-07-012020-09-30E04510-0002021-07-012021-09-30E04510-0002021-11-01jpcrp_cor:OrdinaryShareMemberE04510-0002021-09-30jpcrp_cor:No1MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No2MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No3MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No4MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No5MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No6MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No7MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No8MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No9MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:No10MajorShareholdersMemberE04510-0002021-09-30jpcrp_cor:SharesWithNoVotingRightsMemberE04510-0002021-09-30jpcrp_cor:SharesWithRestrictedVotingRightsTreasurySharesEtcMemberE04510-0002021-09-30jpcrp_cor:SharesWithRestrictedVotingRightsOtherMemberE04510-0002021-09-30jpcrp_cor:OrdinarySharesTreasurySharesSharesWithFullVotingRightsTreasurySharesEtcMemberE04510-0002021-09-30jpcrp_cor:OrdinarySharesSharesWithFullVotingRightsOtherMemberE04510-0002021-09-30jpcrp_cor:OrdinarySharesSharesLessThanOneUnitMemberE04510-0002021-09-30jpcrp_cor:Row1MemberE04510-0002020-03-31E04510-0002020-04-012020-09-30jpcrp040300-q2r_E04510-000:ElectricityReportableSegmentsMemberE04510-0002021-04-012021-09-30jpcrp040300-q2r_E04510-000:ElectricityReportableSegmentsMemberE04510-0002020-04-012020-09-30jpcrp040300-q2r_E04510-000:ElectricPowerSurroundingsRelatedReportableSegmentsMemberE04510-0002021-04-012021-09-30jpcrp040300-q2r_E04510-000:ElectricPowerSurroundingsRelatedReportableSegmentsMemberE04510-0002020-04-012020-09-30jpcrp040300-q2r_E04510-000:OverseasReportableSegmentsMemberE04510-0002021-04-012021-09-30jpcrp040300-q2r_E04510-000:OverseasReportableSegmentsMemberE04510-0002021-04-012021-09-30jpcrp_cor:OtherReportableSegmentsMemberE04510-0002020-04-012020-09-30jpcrp_cor:OtherReportableSegmentsMemberE04510-0002020-04-012020-09-30jpcrp_cor:TotalOfReportableSegmentsAndOthersMemberE04510-0002021-04-012021-09-30jpcrp_cor:TotalOfReportableSegmentsAndOthersMemberE04510-0002021-04-012021-09-30jpcrp_cor:ReconcilingItemsMemberE04510-0002020-04-012020-09-30jpcrp_cor:ReconcilingItemsMemberiso4217:JPYiso4217:JPYxbrli:sharesxbrli:purexbrli:shares