Quarterly Statement Of Cash Flows
| Concept | As at 2024-09-30 | 2024-04-01 to 2024-09-30 | As at 2024-03-31 | As at 2023-09-30 | 2023-04-01 to 2023-09-30 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|
| Quarterly statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | — | 
                                                3,907,325,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,328,047,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                278,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                257,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                -177,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividend income | — | 
                                                -135,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -78,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | 
                                                3,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Foreign exchange losses (gains) | — | 
                                                12,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -214,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | 
                                                1,397,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                458,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | 
                                                -4,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -431,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | 
                                                -188,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                81,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -337,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -252,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | 
                                                5,013,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,955,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                134,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                73,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -3,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -1,644,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,002,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                3,500,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,026,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | — | 
                                                -1,391,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -205,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from collection of loans receivable | — | 
                                                3,913,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                15,714,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                1,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -1,428,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -12,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | ||||||
| Repayments of long-term borrowings | — | 
                                                -129,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -63,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | 
                                                -585,085,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -589,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -744,860,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -653,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                -206,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                319,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                1,120,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                680,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                10,493,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,373,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,777,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,096,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |