Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-06-30 | As at 2023-12-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                7,456,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,377,585,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                308,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                303,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -235,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                9,385,840,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,464,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                207,214,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                212,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Other | 
                                                61,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                61,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                505,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                504,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                384,674,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                384,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                30,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                89,857,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                774,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                785,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                10,160,327,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,250,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                45,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                210,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                330,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                647,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                672,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Retirement benefit liability | 
                                                26,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                26,885,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,773,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                91,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                144,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                137,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                791,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                809,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                33,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Share capital | 
                                                1,175,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,175,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | 
                                                1,275,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,286,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                9,032,697,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,032,925,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -2,354,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,355,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                9,128,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,139,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Foreign currency translation adjustment | 
                                                62,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                62,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                62,967,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                150,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                113,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                9,368,367,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,440,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                10,160,327,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,250,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |