Semi-Annual Consolidated Balance Sheet
| Concept | As at 2023-09-30 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                3,657,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,278,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                291,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                296,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -9,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -10,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                10,888,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,950,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                3,449,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,517,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                1,559,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,624,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles | — | — | 
| Machinery, equipment and vehicles, net | 
                                                184,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                177,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,605,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,605,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | — | — | 
| Leased assets, net | 
                                                35,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,009,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                25,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,935,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                39,550,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,791,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                28,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                270,908,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                154,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                299,903,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                212,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                2,455,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,273,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                2,096,899,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,864,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                184,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                236,927,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                175,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                172,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -1,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                6,204,805,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,003,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                17,093,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,954,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                3,945,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,501,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                1,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                11,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                76,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,277,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                248,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                199,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                6,510,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,328,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Bonds payable | 
                                                98,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                421,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                534,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                28,669,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                500,047,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                522,849,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                160,206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                159,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,253,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,453,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                7,764,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,782,556,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                21,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                160,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                125,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,972,735,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,972,735,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,670,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,670,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                5,349,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,392,982,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -91,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -104,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                8,901,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,931,537,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                492,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                319,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                -165,506,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -173,969,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                -14,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                311,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                130,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                115,282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                9,328,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,171,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                17,093,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,954,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |