Semi-Annual Statement Of Cash Flows
| Concept | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|---|
| Semi-annual statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | 
                                                1,133,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,878,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,335,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,011,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                700,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                623,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                159,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                240,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -227,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -202,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                15,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,803,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Loss (gain) on sale of property, plant and equipment | — | — | 
                                                -764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                28,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                229,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -531,516,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                80,218,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -312,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -367,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -196,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                60,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,907,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                2,243,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,039,281,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                227,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                202,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -14,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -482,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -237,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                1,974,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                992,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -989,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -655,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                1,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | — | 
                                                -121,974,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of investment securities | — | — | 
                                                289,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                107,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                -2,287,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -700,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Proceeds from long-term borrowings | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of long-term borrowings | — | — | 
                                                -10,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -67,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of treasury shares | — | — | 
                                                -99,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -177,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -177,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -326,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -240,994,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                272,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                169,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                -367,522,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                220,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                7,579,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,947,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,726,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |