Consolidated Balance Sheet
| Concept | As at 2025-02-28 | As at 2024-08-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                6,825,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,153,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Costs on construction contracts in progress | 
                                                284,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                141,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                1,277,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                871,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                798,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                855,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                16,391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,303,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                2,442,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,372,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Machinery, equipment and vehicles | — | — | 
| Machinery, equipment and vehicles, net | 
                                                1,692,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,592,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                2,863,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,821,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | — | — | 
| Leased assets, net | 
                                                83,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                75,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                7,163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,928,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                933,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                646,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Goodwill | 
                                                827,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                105,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Other intangible assets | ||
| Investments and other assets | ||
| Investment securities | 
                                                691,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                196,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                341,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                1,125,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                528,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                9,222,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,102,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                25,614,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,405,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Non-current liabilities | ||
| Long-term borrowings | 
                                                2,982,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,442,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                146,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                302,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                235,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                3,694,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,056,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                235,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                232,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | ||
| Short-term borrowings | 
                                                5,065,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,570,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Notes and accounts payable - trade | 
                                                1,125,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                704,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                278,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                1,118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,139,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                153,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                131,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,094,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,393,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                9,434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,290,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                13,129,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,346,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                12,478,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,054,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                1,190,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,176,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,096,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                10,522,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,984,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -345,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -204,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                12,484,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,058,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                25,614,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,405,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments |