Semi-Annual Balance Sheet
| Concept | As at 2025-03-31 | As at 2024-09-30 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                11,033,257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,174,674,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                228,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                483,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                11,831,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,029,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                164,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                169,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                10,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,079,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investments and other assets | 
                                                924,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                791,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                1,098,978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                969,987,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                12,930,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,999,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                919,612,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,354,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,239,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                942,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,288,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,959,219,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                18,076,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                9,945,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                8,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                2,306,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,980,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Net assets | ||
| Share capital | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | ||
| Capital surplus | 
                                                921,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,305,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                11,697,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,128,781,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -2,071,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,500,967,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                10,597,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,013,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation and translation adjustments | 
                                                -385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                10,623,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,019,149,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                26,367,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                12,930,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,999,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |