Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                5,381,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,952,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Inventories | 
                                                334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                365,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                8,202,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,536,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                3,551,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,586,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Leased assets | — | — | 
| Leased assets, net | 
                                                1,740,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,776,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                1,810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                141,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                147,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                4,818,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,439,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                4,608,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,180,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                217,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                267,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                8,510,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                16,713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,710,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                477,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                492,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,843,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,792,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                3,003,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,926,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Lease liabilities | 
                                                1,028,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,038,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                473,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                515,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,502,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                4,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                3,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                8,503,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,107,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -36,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -722,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                11,466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                740,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                845,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                740,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                845,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                12,206,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                16,713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,710,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |