Quarterly 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 | 
|---|---|---|---|---|---|---|---|
| Quarterly statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | 
                                                2,301,253,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,736,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,346,984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,582,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                217,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                215,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                387,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                36,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -89,711,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -60,695,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                7,240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Loss on compensation for damage | — | — | 
                                                1,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                3,217,558,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,791,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                -44,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                183,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -3,344,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,215,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                2,022,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,600,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                91,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -7,244,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Compensation paid for damage | — | — | 
                                                -1,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -976,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -677,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                1,128,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,976,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -433,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -96,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | — | 
                                                -951,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,275,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                -839,994,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,091,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Proceeds from short-term borrowings | — | — | 
                                                650,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                730,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of short-term borrowings | — | — | 
                                                -1,150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -730,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from issuance of bonds | — | — | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -594,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -401,827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -1,105,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -486,814,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                47,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                -769,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                411,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                7,663,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,433,138,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,022,014,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |