Semi-Annual Consolidated 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 consolidated statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | 
                                                420,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,947,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,119,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                435,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                258,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                247,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                347,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Amortization of goodwill | — | — | 
                                                67,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                -300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -98,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -275,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -113,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                23,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in retirement benefit liability | — | — | 
                                                973,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Foreign exchange losses (gains) | — | — | 
                                                1,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -21,678,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                -50,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -48,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Share of loss (profit) of entities accounted for using equity method | — | — | 
                                                -504,975,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,498,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                92,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                741,085,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                777,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,188,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -1,115,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -423,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                35,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -62,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                533,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,427,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                76,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                113,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -23,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -2,257,801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                -1,668,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,509,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -248,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -119,410,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | — | 
                                                -3,109,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -50,605,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                2,952,409,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,562,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Repayments of long-term borrowings | — | — | 
                                                -47,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -57,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of treasury shares | — | — | 
                                                -169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -903,325,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -2,002,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -452,648,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -829,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -385,206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -22,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                11,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                465,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,414,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                1,986,385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,519,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,934,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |