Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-03-31 | As at 2023-06-30 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                576,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                651,230,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                19,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -24,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -19,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                2,610,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,597,303,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                2,744,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,804,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                1,146,697,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,192,018,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles | — | — | 
| Machinery, equipment and vehicles, net | 
                                                310,079,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                319,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,202,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,202,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | — | — | 
| Leased assets, net | 
                                                31,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                53,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                162,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                5,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                215,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                242,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                576,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                599,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                75,298,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term loans receivable | 
                                                34,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                225,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                187,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                185,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -37,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -39,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                3,536,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,646,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                6,146,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,243,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                210,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                1,150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                630,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                19,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                105,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                113,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,237,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,448,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Bonds payable | 
                                                90,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                108,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                733,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                803,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                17,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,903,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                606,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                602,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                14,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                13,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,479,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,560,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                3,717,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,009,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                4,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                75,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                870,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                870,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                819,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                819,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                628,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                440,648,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                2,318,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,130,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                2,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                2,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                4,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                28,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                78,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,754,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                2,429,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,234,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                6,146,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,243,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |