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 | — | 
                                                1,418,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,380,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                355,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                293,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | 
                                                34,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                23,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Foreign exchange losses (gains) | — | 
                                                142,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -204,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | 
                                                125,382,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                70,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | 
                                                -25,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -74,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | 
                                                105,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                22,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                85,030,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -39,047,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | 
                                                391,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                760,313,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -35,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -25,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -417,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -289,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -86,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,017,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | — | 
                                                -849,545,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -701,218,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | — | 
                                                -134,785,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -33,584,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of investment securities | — | 
                                                656,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -18,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -32,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                90,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -780,886,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | ||||||
| Proceeds from long-term borrowings | — | 
                                                82,845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -662,042,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -573,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -131,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | 
                                                -93,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -74,968,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -677,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                649,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                -344,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                132,973,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -1,018,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,019,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                4,922,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,941,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,466,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,446,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |