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 | 
                                                1,977,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,095,788,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                262,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                159,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                24,157,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,482,497,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                10,753,887,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,785,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Land | 
                                                6,551,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,551,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                4,202,378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,233,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                228,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,856,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                5,942,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,256,649,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                5,408,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,787,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                537,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                472,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -3,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                16,924,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,185,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                41,081,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,668,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                3,454,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,323,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                3,156,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,580,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                216,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                807,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,556,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                8,458,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,816,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                1,019,711,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                993,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                1,846,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,808,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,981,099,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,145,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                4,997,787,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,105,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                13,455,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,921,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                67,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                670,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                855,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses for directors (and other officers) | 
                                                4,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,500,039,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,500,039,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,233,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,233,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                19,463,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,869,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,005,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -66,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                21,191,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,536,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                1,917,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,646,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                54,351,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,592,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,971,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,707,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                4,462,654,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,502,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                27,626,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,747,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                41,081,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,668,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |