Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                9,174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,937,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                3,083,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,586,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                363,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                386,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                14,079,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,204,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                970,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                931,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Land | 
                                                1,645,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,645,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                12,557,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,912,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                228,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -33,150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -33,275,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Leased assets | 
                                                249,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,006,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures | 
                                                9,550,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,187,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                124,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                858,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                857,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                4,928,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,923,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                590,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                571,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                54,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                17,610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,979,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | — | — | 
| Other assets | ||
| Deferred assets | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Bond issuance costs | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred assets | ||
| Assets | 
                                                31,694,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,191,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | — | — | 
| Liabilities | ||
| Current liabilities | ||
| Accounts payable - trade | 
                                                3,211,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,278,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                2,556,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of bonds payable | 
                                                300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                490,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                2,480,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,980,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accrued expenses | 
                                                1,535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,569,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                725,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                11,145,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,148,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                81,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                103,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Non-current liabilities | ||
| Non-current liabilities | 
                                                10,197,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,935,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Bonds payable | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                5,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                98,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                1,585,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term accounts payable - other | 
                                                2,606,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                21,342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,083,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                10,285,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,050,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                8,591,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,585,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                1,649,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,425,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -55,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -60,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                -3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                -5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                10,351,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,108,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                31,694,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,191,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Valuation and translation adjustments | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings |