Semi-Annual Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                6,185,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,754,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Inventories | 
                                                16,416,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,039,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                622,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,042,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                37,235,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                24,996,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,347,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Land | 
                                                3,145,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,145,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                510,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                429,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                2,371,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,527,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                1,173,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,158,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investments and other assets | 
                                                5,874,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,305,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                32,043,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                69,279,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,936,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                10,531,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,581,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                323,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,415,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                23,324,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,306,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                25,568,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,469,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Bonds payable | 
                                                1,700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                15,749,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,569,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                70,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,763,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                48,892,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,776,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for bonuses | 
                                                579,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                597,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,755,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,755,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | ||
| Capital surplus | 
                                                896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                12,703,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,202,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                15,191,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,691,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                2,204,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,662,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                5,106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                20,386,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                69,279,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,936,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |