Quarterly Statement Of Cash Flows
| Concept | As at 2023-09-30 | 2023-04-01 to 2023-09-30 | As at 2023-03-31 | As at 2022-09-30 | 2022-04-01 to 2022-09-30 | As at 2022-03-31 | 
|---|---|---|---|---|---|---|
| Quarterly statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | — | 
                                                3,813,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,889,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                830,652,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                741,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Impairment losses | — | 
                                                3,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                -8,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -142,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividend income | — | 
                                                -86,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -17,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | 
                                                62,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                61,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Foreign exchange losses (gains) | — | 
                                                -444,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,562,262,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | 
                                                -369,925,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                329,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | 
                                                -2,637,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -890,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | 
                                                -163,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -518,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -1,173,918,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                996,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | 
                                                380,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,970,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                1,092,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                610,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -58,714,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -63,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -726,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -725,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                687,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,792,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | — | 
                                                -2,931,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,842,168,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                4,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                675,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | — | 
                                                -139,979,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,157,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of investment securities | — | 
                                                274,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -9,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -51,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -3,671,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,579,651,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | ||||||
| Proceeds from long-term borrowings | — | 
                                                9,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -2,689,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,717,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | 
                                                -1,243,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,655,637,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                2,124,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,270,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                887,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                769,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                27,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,251,545,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                9,225,685,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,197,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,798,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,548,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |