CIK 0002018462
| Fakt | Wert | Zeit | Quelle |
|---|---|---|---|
| accounts_payable | {"unit": "JPY", "value": 1330000, "concept": "us-gaap:AccountsPayableCurrent"} | 2025-09-30 | sec_edgar |
| accounts_payable | {"unit": "JPY", "value": 6384000, "concept": "us-gaap:AccountsPayableCurrent"} | 2024-09-30 | sec_edgar |
| accounts_payable | {"unit": "JPY", "value": 6354000, "concept": "us-gaap:AccountsPayableCurrent"} | 2023-09-30 | sec_edgar |
| accounts_receivable | {"unit": "JPY", "value": 48323000, "concept": "us-gaap:AccountsReceivableNetCurrent"} | 2025-09-30 | sec_edgar |
| accounts_receivable | {"unit": "JPY", "value": 218002000, "concept": "us-gaap:AccountsReceivableNetCurrent"} | 2024-09-30 | sec_edgar |
| accounts_receivable | {"unit": "JPY", "value": 211398000, "concept": "us-gaap:AccountsReceivableNetCurrent"} | 2023-09-30 | sec_edgar |
| capex | {"unit": "JPY", "value": 28338000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEq | 2025-09-30 | sec_edgar |
| capex | {"unit": "JPY", "value": 18814000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEq | 2024-09-30 | sec_edgar |
| capex | {"unit": "JPY", "value": 20477000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEq | 2023-09-30 | sec_edgar |
| capex | {"unit": "JPY", "value": 3561000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEqu | 2022-09-30 | sec_edgar |
| cash_and_equivalents | {"unit": "JPY", "value": 534889000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingVa | 2025-09-30 | sec_edgar |
| cash_and_equivalents | {"unit": "JPY", "value": 456775000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingVa | 2024-09-30 | sec_edgar |
| cash_and_equivalents | {"unit": "JPY", "value": 427967000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingVa | 2023-09-30 | sec_edgar |
| cashflow_financing | {"unit": "JPY", "value": 668131000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingAc | 2025-09-30 | sec_edgar |
| cashflow_financing | {"unit": "JPY", "value": 315646000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingAc | 2024-09-30 | sec_edgar |
| cashflow_financing | {"unit": "JPY", "value": 925259000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingAc | 2023-09-30 | sec_edgar |
| cashflow_financing | {"unit": "JPY", "value": -6588000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingAct | 2022-09-30 | sec_edgar |
| cashflow_investing | {"unit": "JPY", "value": -45997000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingAc | 2025-09-30 | sec_edgar |
| cashflow_investing | {"unit": "JPY", "value": -44025000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingAc | 2024-09-30 | sec_edgar |
| cashflow_investing | {"unit": "JPY", "value": -20477000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingAc | 2023-09-30 | sec_edgar |
| cashflow_investing | {"unit": "JPY", "value": -15447000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingAc | 2022-09-30 | sec_edgar |
| cashflow_operating | {"unit": "JPY", "value": -544020000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingA | 2025-09-30 | sec_edgar |
| cashflow_operating | {"unit": "JPY", "value": -242813000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingA | 2024-09-30 | sec_edgar |
| cashflow_operating | {"unit": "JPY", "value": -739915000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingA | 2023-09-30 | sec_edgar |
| cashflow_operating | {"unit": "JPY", "value": -115258000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingA | 2022-09-30 | sec_edgar |
| common_shares_issued | {"unit": "shares", "value": 1153806, "concept": "us-gaap:CommonStockSharesIssued"} | 2025-09-30 | sec_edgar |
| common_shares_issued | {"unit": "shares", "value": 764462, "concept": "us-gaap:CommonStockSharesIssued"} | 2024-09-30 | sec_edgar |
| common_shares_issued | {"unit": "shares", "value": 7114140, "concept": "us-gaap:CommonStockSharesIssued"} | 2023-09-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 1153806, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2025-09-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 764462, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2024-09-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 7114140, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2023-09-30 | sec_edgar |
| current_assets | {"unit": "JPY", "value": 992442000, "concept": "us-gaap:AssetsCurrent"} | 2025-09-30 | sec_edgar |
| current_assets | {"unit": "JPY", "value": 947487000, "concept": "us-gaap:AssetsCurrent"} | 2024-09-30 | sec_edgar |
| current_assets | {"unit": "JPY", "value": 1010868000, "concept": "us-gaap:AssetsCurrent"} | 2023-09-30 | sec_edgar |
| current_liabilities | {"unit": "JPY", "value": 465032000, "concept": "us-gaap:LiabilitiesCurrent"} | 2025-09-30 | sec_edgar |
| current_liabilities | {"unit": "JPY", "value": 434996000, "concept": "us-gaap:LiabilitiesCurrent"} | 2024-09-30 | sec_edgar |
| current_liabilities | {"unit": "JPY", "value": 366673000, "concept": "us-gaap:LiabilitiesCurrent"} | 2023-09-30 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 1153806} | 2025-09-30 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 22933860} | 2024-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -683.34, "concept": "us-gaap:EarningsPerShareBasic", "currency | 2025-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -1334.58, "concept": "us-gaap:EarningsPerShareBasic", "currenc | 2024-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -2685.19, "concept": "us-gaap:EarningsPerShareBasic", "currenc | 2023-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -0.73, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2022-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": -683.34, "concept": "us-gaap:EarningsPerShareDiluted", "curren | 2025-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": -1334.58, "concept": "us-gaap:EarningsPerShareDiluted", "curre | 2024-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": -2685.19, "concept": "us-gaap:EarningsPerShareDiluted", "curre | 2023-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": -0.73, "concept": "us-gaap:EarningsPerShareDiluted", "currency | 2022-09-30 | sec_edgar |
| industry_sic | {"code": "3640", "scheme": "SIC", "description": "Electric Lighting & Wiring Equipment"} | sec_edgar | |
| intangible_assets | {"unit": "JPY", "value": 5121000, "concept": "us-gaap:FiniteLivedIntangibleAssetsNet"} | 2025-09-30 | sec_edgar |
| intangible_assets | {"unit": "JPY", "value": 8283000, "concept": "us-gaap:FiniteLivedIntangibleAssetsNet"} | 2024-09-30 | sec_edgar |
| intangible_assets | {"unit": "JPY", "value": 11937000, "concept": "us-gaap:FiniteLivedIntangibleAssetsNet"} | 2023-09-30 | sec_edgar |
| inventory | {"unit": "JPY", "value": 264286000, "concept": "us-gaap:InventoryNet"} | 2025-09-30 | sec_edgar |
| inventory | {"unit": "JPY", "value": 206636000, "concept": "us-gaap:InventoryNet"} | 2024-09-30 | sec_edgar |
| inventory | {"unit": "JPY", "value": 183897000, "concept": "us-gaap:InventoryNet"} | 2023-09-30 | sec_edgar |
| long_term_debt | {"unit": "JPY", "value": 272376000, "concept": "us-gaap:LongTermDebt"} | 2025-09-30 | sec_edgar |
| long_term_debt | {"unit": "JPY", "value": 246254000, "concept": "us-gaap:LongTermDebt"} | 2024-09-30 | sec_edgar |
| long_term_debt | {"unit": "JPY", "value": 241276000, "concept": "us-gaap:LongTermDebt"} | 2023-09-30 | sec_edgar |
| long_term_debt_current | {"unit": "JPY", "value": 261940000, "concept": "us-gaap:LongTermDebtCurrent"} | 2025-09-30 | sec_edgar |
| long_term_debt_current | {"unit": "JPY", "value": 217970000, "concept": "us-gaap:LongTermDebtCurrent"} | 2024-09-30 | sec_edgar |
| long_term_debt_current | {"unit": "JPY", "value": 215000000, "concept": "us-gaap:LongTermDebtCurrent"} | 2023-09-30 | sec_edgar |
| long_term_debt_noncurrent | {"unit": "JPY", "value": 10436000, "concept": "us-gaap:LongTermDebtNoncurrent"} | 2025-09-30 | sec_edgar |
| long_term_debt_noncurrent | {"unit": "JPY", "value": 28284000, "concept": "us-gaap:LongTermDebtNoncurrent"} | 2024-09-30 | sec_edgar |
| long_term_debt_noncurrent | {"unit": "JPY", "value": 26276000, "concept": "us-gaap:LongTermDebtNoncurrent"} | 2023-09-30 | sec_edgar |
| net_income | {"unit": "JPY", "value": -626312000, "concept": "us-gaap:NetIncomeLoss"} | 2025-09-30 | sec_edgar |
| net_income | {"unit": "JPY", "value": -479921000, "concept": "us-gaap:NetIncomeLoss"} | 2024-09-30 | sec_edgar |
| net_income | {"unit": "JPY", "value": -633956000, "concept": "us-gaap:NetIncomeLoss"} | 2023-09-30 | sec_edgar |
| net_income | {"unit": "JPY", "value": -5180000, "concept": "us-gaap:NetIncomeLoss"} | 2022-09-30 | sec_edgar |
| operating_expenses | {"unit": "JPY", "value": 1146127000, "concept": "us-gaap:OperatingExpenses"} | 2025-09-30 | sec_edgar |
| operating_expenses | {"unit": "JPY", "value": 1231587000, "concept": "us-gaap:OperatingExpenses"} | 2024-09-30 | sec_edgar |
| operating_expenses | {"unit": "JPY", "value": 1188055000, "concept": "us-gaap:OperatingExpenses"} | 2023-09-30 | sec_edgar |
| operating_expenses | {"unit": "JPY", "value": 698360000, "concept": "us-gaap:OperatingExpenses"} | 2022-09-30 | sec_edgar |
| operating_income | {"unit": "JPY", "value": -601437000, "concept": "us-gaap:OperatingIncomeLoss"} | 2025-09-30 | sec_edgar |
| operating_income | {"unit": "JPY", "value": -447184000, "concept": "us-gaap:OperatingIncomeLoss"} | 2024-09-30 | sec_edgar |
| operating_income | {"unit": "JPY", "value": -628534000, "concept": "us-gaap:OperatingIncomeLoss"} | 2023-09-30 | sec_edgar |
| operating_income | {"unit": "JPY", "value": -16239000, "concept": "us-gaap:OperatingIncomeLoss"} | 2022-09-30 | sec_edgar |
| operating_lease_liability | {"unit": "JPY", "value": 9182000, "concept": "us-gaap:OperatingLeaseLiability"} | 2025-09-30 | sec_edgar |
| operating_lease_liability | {"unit": "JPY", "value": 10932000, "concept": "us-gaap:OperatingLeaseLiability"} | 2024-09-30 | sec_edgar |
| operating_lease_liability | {"unit": "JPY", "value": 10795000, "concept": "us-gaap:OperatingLeaseLiability"} | 2023-09-30 | sec_edgar |
| operating_lease_liability | {"unit": "JPY", "value": 9100000, "concept": "us-gaap:OperatingLeaseLiability"} | 2022-09-30 | sec_edgar |
| ppe_net | {"unit": "JPY", "value": 27092000, "concept": "us-gaap:PropertyPlantAndEquipmentNet"} | 2025-09-30 | sec_edgar |
| ppe_net | {"unit": "JPY", "value": 21580000, "concept": "us-gaap:PropertyPlantAndEquipmentNet"} | 2024-09-30 | sec_edgar |
| ppe_net | {"unit": "JPY", "value": 19808000, "concept": "us-gaap:PropertyPlantAndEquipmentNet"} | 2023-09-30 | sec_edgar |
| pretax_income | {"unit": "JPY", "value": -626312000, "concept": "us-gaap:IncomeLossFromContinuingOperation | 2025-09-30 | sec_edgar |
| pretax_income | {"unit": "JPY", "value": -479921000, "concept": "us-gaap:IncomeLossFromContinuingOperation | 2024-09-30 | sec_edgar |
| pretax_income | {"unit": "JPY", "value": -633956000, "concept": "us-gaap:IncomeLossFromContinuingOperation | 2023-09-30 | sec_edgar |
| pretax_income | {"unit": "JPY", "value": -5180000, "concept": "us-gaap:IncomeLossFromContinuingOperationsB | 2022-09-30 | sec_edgar |
| retained_earnings | {"unit": "JPY", "value": -2828980000, "concept": "us-gaap:RetainedEarningsAccumulatedDefic | 2025-09-30 | sec_edgar |
| retained_earnings | {"unit": "JPY", "value": -2202668000, "concept": "us-gaap:RetainedEarningsAccumulatedDefic | 2024-09-30 | sec_edgar |
| retained_earnings | {"unit": "JPY", "value": -1722747000, "concept": "us-gaap:RetainedEarningsAccumulatedDefic | 2023-09-30 | sec_edgar |
| revenue | {"unit": "JPY", "value": 544690000, "concept": "us-gaap:RevenueFromContractWithCustomerExc | 2025-09-30 | sec_edgar |
| revenue | {"unit": "JPY", "value": 784403000, "concept": "us-gaap:RevenueFromContractWithCustomerExc | 2024-09-30 | sec_edgar |
| revenue | {"unit": "JPY", "value": 559521000, "concept": "us-gaap:RevenueFromContractWithCustomerExc | 2023-09-30 | sec_edgar |
| revenue | {"unit": "JPY", "value": 682121000, "concept": "us-gaap:RevenueFromContractWithCustomerExc | 2022-09-30 | sec_edgar |
| rnd_expense | {"unit": "JPY", "value": 26200000, "concept": "us-gaap:ResearchAndDevelopmentExpense"} | 2025-09-30 | sec_edgar |
| rnd_expense | {"unit": "JPY", "value": 49000000, "concept": "us-gaap:ResearchAndDevelopmentExpense"} | 2024-09-30 | sec_edgar |
| rnd_expense | {"unit": "JPY", "value": 75600000, "concept": "us-gaap:ResearchAndDevelopmentExpense"} | 2023-09-30 | sec_edgar |
| rnd_expense | {"unit": "JPY", "value": 40600000, "concept": "us-gaap:ResearchAndDevelopmentExpense"} | 2022-09-30 | sec_edgar |
| sga_expense | {"unit": "JPY", "value": 892048000, "concept": "us-gaap:SellingGeneralAndAdministrativeExp | 2025-09-30 | sec_edgar |
| sga_expense | {"unit": "JPY", "value": 870385000, "concept": "us-gaap:SellingGeneralAndAdministrativeExp | 2024-09-30 | sec_edgar |
| sga_expense | {"unit": "JPY", "value": 897965000, "concept": "us-gaap:SellingGeneralAndAdministrativeExp | 2023-09-30 | sec_edgar |
| sga_expense | {"unit": "JPY", "value": 453545000, "concept": "us-gaap:SellingGeneralAndAdministrativeExp | 2022-09-30 | sec_edgar |
| share_based_compensation | {"unit": "JPY", "value": 5213000, "concept": "us-gaap:ShareBasedCompensation"} | 2025-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 916550, "concept": "us-gaap:WeightedAverageNumberOfSharesOutst | 2025-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 359604, "concept": "us-gaap:WeightedAverageNumberOfSharesOutst | 2024-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 236094, "concept": "us-gaap:WeightedAverageNumberOfSharesOutst | 2023-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 7060200, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2022-09-30 | sec_edgar |
| shares_wavg_diluted | {"unit": "shares", "value": 916550, "concept": "us-gaap:WeightedAverageNumberOfDilutedShar | 2025-09-30 | sec_edgar |
| shares_wavg_diluted | {"unit": "shares", "value": 359604, "concept": "us-gaap:WeightedAverageNumberOfDilutedShar | 2024-09-30 | sec_edgar |
| shares_wavg_diluted | {"unit": "shares", "value": 236094, "concept": "us-gaap:WeightedAverageNumberOfDilutedShar | 2023-09-30 | sec_edgar |
| shares_wavg_diluted | {"unit": "shares", "value": 7060200, "concept": "us-gaap:WeightedAverageNumberOfDilutedSha | 2022-09-30 | sec_edgar |
| stockholders_equity | {"unit": "JPY", "value": 469948000, "concept": "us-gaap:StockholdersEquity"} | 2025-09-30 | sec_edgar |
| stockholders_equity | {"unit": "JPY", "value": 354790000, "concept": "us-gaap:StockholdersEquity"} | 2024-09-30 | sec_edgar |
| stockholders_equity | {"unit": "JPY", "value": 695991000, "concept": "us-gaap:StockholdersEquity"} | 2023-09-30 | sec_edgar |
| stockholders_equity | {"unit": "JPY", "value": 467920000, "concept": "us-gaap:StockholdersEquity"} | 2022-09-30 | sec_edgar |
| stockholders_equity | {"unit": "JPY", "value": 473100000, "concept": "us-gaap:StockholdersEquity"} | 2021-09-30 | sec_edgar |
| total_assets | {"unit": "JPY", "value": 1087166000, "concept": "us-gaap:Assets"} | 2025-09-30 | sec_edgar |
| total_assets | {"unit": "JPY", "value": 1234753000, "concept": "us-gaap:Assets"} | 2024-09-30 | sec_edgar |
| total_assets | {"unit": "JPY", "value": 1149212000, "concept": "us-gaap:Assets"} | 2023-09-30 | sec_edgar |
| total_liabilities | {"unit": "JPY", "value": 617218000, "concept": "us-gaap:Liabilities"} | 2025-09-30 | sec_edgar |
| total_liabilities | {"unit": "JPY", "value": 879963000, "concept": "us-gaap:Liabilities"} | 2024-09-30 | sec_edgar |
| total_liabilities | {"unit": "JPY", "value": 453221000, "concept": "us-gaap:Liabilities"} | 2023-09-30 | sec_edgar |
| total_liabilities_and_equity | {"unit": "JPY", "value": 1087166000, "concept": "us-gaap:LiabilitiesAndStockholdersEquity" | 2025-09-30 | sec_edgar |
| total_liabilities_and_equity | {"unit": "JPY", "value": 1234753000, "concept": "us-gaap:LiabilitiesAndStockholdersEquity" | 2024-09-30 | sec_edgar |
| total_liabilities_and_equity | {"unit": "JPY", "value": 1149212000, "concept": "us-gaap:LiabilitiesAndStockholdersEquity" | 2023-09-30 | sec_edgar |
| xbrl:AccountsPayableAndOtherAccruedLiabilitiesCurrent | {"unit": "JPY", "value": 139291000} | 2025-09-30 | sec_edgar |
| xbrl:AccountsPayableAndOtherAccruedLiabilitiesCurrent | {"unit": "JPY", "value": 162919000} | 2024-09-30 | sec_edgar |
| xbrl:AccountsPayableAndOtherAccruedLiabilitiesCurrent | {"unit": "JPY", "value": 116626000} | 2023-09-30 | sec_edgar |
| xbrl:AccountsPayableCurrent | {"unit": "JPY", "value": 1330000} | 2025-09-30 | sec_edgar |
| xbrl:AccountsPayableCurrent | {"unit": "JPY", "value": 6384000} | 2024-09-30 | sec_edgar |
| xbrl:AccountsPayableCurrent | {"unit": "JPY", "value": 6354000} | 2023-09-30 | sec_edgar |
| xbrl:AccountsPayableOtherCurrent | {"unit": "JPY", "value": 34634000} | 2025-09-30 | sec_edgar |
| xbrl:AccountsPayableOtherCurrent | {"unit": "JPY", "value": 77739000} | 2024-09-30 | sec_edgar |
| xbrl:AccountsPayableOtherCurrent | {"unit": "JPY", "value": 56488000} | 2023-09-30 | sec_edgar |
| xbrl:AccountsPayableTradeCurrent | {"unit": "JPY", "value": 0} | 2025-09-30 | sec_edgar |
| xbrl:AccountsPayableTradeCurrent | {"unit": "JPY", "value": 0} | 2024-09-30 | sec_edgar |
| xbrl:AccountsPayableTradeCurrent | {"unit": "JPY", "value": 0} | 2023-09-30 | sec_edgar |
| xbrl:AccountsReceivableNet | {"unit": "JPY", "value": 211400000} | 2023-10-01 | sec_edgar |
| xbrl:AccountsReceivableNet | {"unit": "JPY", "value": 264100000} | 2022-10-01 | sec_edgar |
| xbrl:AccountsReceivableNetCurrent | {"unit": "JPY", "value": 48323000} | 2025-09-30 | sec_edgar |
| xbrl:AccountsReceivableNetCurrent | {"unit": "JPY", "value": 218002000} | 2024-09-30 | sec_edgar |
| xbrl:AccountsReceivableNetCurrent | {"unit": "JPY", "value": 211398000} | 2023-09-30 | sec_edgar |
| xbrl:AccruedVacationCurrent | {"unit": "JPY", "value": 9785000} | 2025-09-30 | sec_edgar |
| xbrl:AccruedVacationCurrent | {"unit": "JPY", "value": 7529000} | 2024-09-30 | sec_edgar |
| xbrl:AccruedVacationCurrent | {"unit": "JPY", "value": 6156000} | 2023-09-30 | sec_edgar |
| xbrl:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | {"unit": "JPY", "value": 71911000} | 2025-09-30 | sec_edgar |
| xbrl:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | {"unit": "JPY", "value": 49241000} | 2024-09-30 | sec_edgar |
| xbrl:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | {"unit": "JPY", "value": 32602000} | 2023-09-30 | sec_edgar |
| xbrl:AdditionalPaidInCapital | {"unit": "JPY", "value": 3238928000} | 2025-09-30 | sec_edgar |
| xbrl:AdditionalPaidInCapital | {"unit": "JPY", "value": 2457458000} | 2024-09-30 | sec_edgar |
| xbrl:AdditionalPaidInCapital | {"unit": "JPY", "value": 2243745000} | 2023-09-30 | sec_edgar |
| xbrl:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | {"unit": "JPY", "value": 5213000} | 2025-09-30 | sec_edgar |
| xbrl:AdvertisingExpense | {"unit": "JPY", "value": 12500000} | 2025-09-30 | sec_edgar |
| xbrl:AdvertisingExpense | {"unit": "JPY", "value": 7900000} | 2024-09-30 | sec_edgar |
| xbrl:AdvertisingExpense | {"unit": "JPY", "value": 10300000} | 2023-09-30 | sec_edgar |
| xbrl:AdvertisingExpense | {"unit": "JPY", "value": 11200000} | 2022-09-30 | sec_edgar |
| xbrl:AllowanceForDoubtfulAccountsReceivable | {"unit": "JPY", "value": 0} | 2025-09-30 | sec_edgar |
| xbrl:AllowanceForDoubtfulAccountsReceivable | {"unit": "JPY", "value": 0} | 2024-09-30 | sec_edgar |
| xbrl:AllowanceForDoubtfulAccountsReceivable | {"unit": "JPY", "value": 0} | 2023-09-30 | sec_edgar |
| xbrl:AmortizationOfIntangibleAssets | {"unit": "JPY", "value": 3700000} | 2025-09-30 | sec_edgar |
| xbrl:AmortizationOfIntangibleAssets | {"unit": "JPY", "value": 3700000} | 2024-09-30 | sec_edgar |
| xbrl:AmortizationOfIntangibleAssets | {"unit": "JPY", "value": 4200000} | 2023-09-30 | sec_edgar |
| xbrl:AmortizationOfIntangibleAssets | {"unit": "JPY", "value": 5400000} | 2022-09-30 | sec_edgar |
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