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 | 
                                                1,601,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,633,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,175,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                603,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                893,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                888,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                8,302,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,043,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                -6,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -15,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -10,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                49,872,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                -385,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -371,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                31,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                221,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -77,653,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -146,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -121,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -37,052,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                2,506,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,389,925,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                15,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -50,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -36,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                1,523,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,621,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -964,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -728,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | — | 
                                                -10,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -292,562,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Loan advances | — | — | 
                                                -43,113,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -29,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from collection of loans receivable | — | — | 
                                                55,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -26,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                -1,378,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,233,804,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Proceeds from long-term borrowings | — | — | 
                                                3,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of long-term borrowings | — | — | 
                                                -3,815,413,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,650,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of treasury shares | — | — | 
                                                -60,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -482,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -648,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -293,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -1,464,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,426,001,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                7,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                -1,311,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,978,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                27,836,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                29,148,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                27,169,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |