Quarterly Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Quarterly balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                4,878,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,073,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                94,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                108,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                95,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                8,587,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,239,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                2,452,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,391,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings | — | — | 
| Buildings, net | 
                                                199,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                181,001,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery and equipment | — | — | 
| Machinery and equipment, net | 
                                                178,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                188,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,677,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,677,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                396,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                344,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                70,133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Investments and other assets | 
                                                3,393,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,709,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                1,155,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,177,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shares of subsidiaries and associates | 
                                                1,955,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,258,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                286,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                278,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -5,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,384,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                5,915,199,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,172,339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred assets | 
                                                3,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred assets | ||
| Bond issuance costs | 
                                                3,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                14,506,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,416,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                833,219,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,144,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                170,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                114,178,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                179,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                240,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,134,961,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,689,913,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Bonds payable | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                506,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                309,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,068,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                873,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                3,203,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,563,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,204,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,204,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                821,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                819,054,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                8,275,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,233,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -39,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -45,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                10,262,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,211,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                1,040,947,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                641,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,040,947,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                641,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                11,303,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,853,149,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                14,506,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,416,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |