Semi-Annual Consolidated Statement Of Cash Flows
| Concept | 2024-01-01 to 2024-06-30 | As at 2024-06-30 | As at 2023-12-31 | 2023-01-01 to 2023-06-30 | As at 2023-06-30 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | 
                                                4,003,853,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,097,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | 
                                                286,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                301,721,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Amortization of goodwill | 
                                                82,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                59,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in allowance for doubtful accounts | 
                                                10,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -30,911,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividend income | 
                                                -24,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -53,887,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest expenses | 
                                                1,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                76,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in retirement benefit liability | 
                                                -4,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                28,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Share of loss (profit) of entities accounted for using equity method | 
                                                -14,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                13,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in trade receivables | 
                                                -67,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -115,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in inventories | 
                                                19,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -173,490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in trade payables | 
                                                101,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                197,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                -141,599,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -307,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | 
                                                5,164,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,932,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | 
                                                24,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                54,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -8,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -76,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -1,469,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -859,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                3,714,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,371,466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | 
                                                -145,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -138,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | 
                                                30,437,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | 
                                                -987,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of shares of subsidiaries resulting in change in scope of consolidation | 
                                                -1,157,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                -33,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -2,410,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -365,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | ||||||
| Purchase of treasury shares | 
                                                -742,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -3,543,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | 
                                                -693,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -655,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -3,399,398,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -4,201,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                -10,334,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -10,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                113,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                69,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -1,982,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -126,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                17,590,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,572,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,814,975,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,941,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |