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 | 
                                                3,942,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,125,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                106,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -5,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,343,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                8,031,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,169,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                3,791,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,549,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                554,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                578,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,808,462,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,808,462,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | — | — | 
| Leased assets, net | 
                                                1,046,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                844,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                38,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                14,947,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                47,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                616,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                647,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                392,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                444,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                110,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                122,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -9,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,678,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                4,455,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,246,913,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                12,486,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,416,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                1,087,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                981,818,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                1,601,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,601,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                377,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                353,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                78,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                218,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                287,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                3,832,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,123,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                544,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                176,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                681,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                504,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                317,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                320,735,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,705,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,163,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                5,538,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,287,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                138,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities for land revaluation | 
                                                95,011,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,011,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                886,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                886,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                968,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                968,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                6,463,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,584,952,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -355,424,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -316,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                7,962,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,122,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                220,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                239,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Revaluation reserve for land | 
                                                -1,253,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,253,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                18,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                -1,014,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -993,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                6,948,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,129,330,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                12,486,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,416,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |