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 | 
                                                14,078,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,759,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,463,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,637,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -12,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                27,867,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,861,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                6,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,787,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Machinery and equipment | — | — | 
| Machinery and equipment, net | 
                                                20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures | — | — | 
| Tools, furniture and fixtures, net | 
                                                1,323,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,108,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                653,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                653,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                122,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                556,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                572,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investments and other assets | 
                                                9,293,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,799,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                333,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                319,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                4,392,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,883,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -79,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -83,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                15,977,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,159,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                43,844,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,021,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                1,763,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,742,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                518,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                565,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,499,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,648,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                8,941,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,883,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                2,544,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,175,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                1,603,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,114,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                149,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                580,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                576,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                358,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                366,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                10,544,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,997,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for bonuses | 
                                                353,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                485,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                464,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Share capital | 
                                                5,912,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | ||
| Capital surplus | 
                                                6,829,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,829,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                16,416,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,718,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -12,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,104,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                29,146,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,343,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                1,004,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                455,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                3,478,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                962,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                33,299,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,023,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                180,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                43,844,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,021,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |