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Statement - Consolidated Statements of Changes in Equity Consolidated Statements of Changes in Equity http://www.kubota.co.jp/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncome false R6.xml false Sheet 108 - Statement - Consolidated Statements of Changes in Equity (Parenthetical) Consolidated Statements of Changes in Equity (Parenthetical) http://www.kubota.co.jp/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncomeParenthetical false R7.xml false Sheet 109 - Statement - Consolidated Statements of Cash Flows Consolidated Statements of Cash Flows http://www.kubota.co.jp/taxonomy/role/StatementOfCashFlowsIndirect false R8.xml false Sheet 110 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlock false R9.xml false Sheet 111 - Disclosure - INVENTORIES INVENTORIES http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsInventoryDisclosureTextBlock false R10.xml false Sheet 112 - Disclosure - INVESTMENTS IN AND LOAN RECEIVABLES FROM AFFILIATED COMPANIES INVESTMENTS IN AND LOAN RECEIVABLES FROM AFFILIATED COMPANIES http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsInvestmentsInAndAdvancesToAffiliatesTextBlock false R11.xml false Sheet 113 - Disclosure - OTHER INVESTMENTS OTHER INVESTMENTS http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsInvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock false R12.xml false Sheet 114 - Disclosure - FINANCE RECEIVABLES FINANCE RECEIVABLES http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsFinanceReceivablesTextBlock false R13.xml false Sheet 115 - Disclosure - ALLOWANCE FOR DOUBTFUL ACCOUNTS ALLOWANCE FOR DOUBTFUL ACCOUNTS http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsAllowanceForDoubtfulAccountsTextBlock false R14.xml false Sheet 116 - Disclosure - SHORT-TERM BORROWINGS AND LONG-TERM DEBT SHORT-TERM BORROWINGS AND LONG-TERM DEBT http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlock false R15.xml false Sheet 117 - Disclosure - RETIREMENT AND PENSION PLANS RETIREMENT AND PENSION PLANS http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlock false R16.xml false Sheet 118 - Disclosure - REVENUE RECOGNITION FOR LONG-TERM CONTRACTS REVENUE RECOGNITION FOR LONG-TERM CONTRACTS http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsLongTermContractsOrProgramsDisclosureTextBlock false R17.xml false Sheet 119 - Disclosure - INCOME TAXES INCOME TAXES http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock false R18.xml false Sheet 120 - Disclosure - SHAREHOLDERS' EQUITY SHAREHOLDERS' EQUITY http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlock false R19.xml false Sheet 121 - Disclosure - OTHER COMPREHENSIVE INCOME (LOSS) OTHER COMPREHENSIVE INCOME (LOSS) http://www.kubota.co.jp/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlock false R20.xml false Sheet 122 - 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