Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                4,930,812,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,419,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                298,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                338,172,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -9,873,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                6,854,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,604,872,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                5,184,346,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,205,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                2,162,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,167,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles | — | — | 
| Machinery, equipment and vehicles, net | 
                                                32,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,881,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                2,781,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,765,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | — | — | 
| Leased assets, net | 
                                                149,550,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                171,579,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                58,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                213,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                238,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                44,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                257,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                274,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                2,075,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,857,522,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                868,526,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                716,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,208,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,142,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -1,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                7,517,975,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,337,442,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                14,372,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,942,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                56,235,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                60,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                157,076,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                324,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                366,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,205,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,630,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                2,843,240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,956,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                111,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                136,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                1,215,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,219,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                79,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                4,357,556,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,452,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                6,562,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,082,506,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                108,209,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                116,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                231,735,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                157,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,047,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,047,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                6,487,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,523,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -516,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -516,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                7,768,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,804,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                51,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                -9,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,009,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                41,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                7,809,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,859,808,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                14,372,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,942,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |