Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-10-31 | As at 2024-04-30 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                2,421,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,718,384,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                210,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                211,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -25,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -27,422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                4,580,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,932,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                1,687,860,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,766,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | 
                                                3,153,901,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,158,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -1,724,417,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,696,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated impairment | 
                                                -480,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -480,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures, net | 
                                                948,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                981,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles | 
                                                3,524,913,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,629,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -3,121,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,146,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated impairment | 
                                                -212,648,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -260,133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles, net | 
                                                190,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                222,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                473,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                475,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                28,177,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -8,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                19,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Other | 
                                                8,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                13,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,406,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                2,966,156,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,099,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                2,861,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,005,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term loans receivable | 
                                                1,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                104,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                89,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                4,667,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,887,392,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                9,248,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,819,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                287,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                464,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                325,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                380,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                22,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                112,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                28,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,225,674,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,576,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                201,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,128,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                32,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,129,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                9,268,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                19,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,868,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,855,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                4,094,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,431,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                400,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                425,918,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                41,281,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                428,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                447,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,303,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,303,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                3,085,268,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,988,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -275,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                270,018,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -198,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -198,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                3,914,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,363,531,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                887,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                930,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                56,918,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                815,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                945,334,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,024,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                293,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                5,153,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,387,975,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                9,248,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,819,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |