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 | 
|---|---|---|---|---|---|---|---|
| Statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | 
                                                -800,541,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -199,079,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,402,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,324,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                986,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                916,699,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                201,146,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                65,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -15,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -22,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -31,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                161,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                106,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Foreign exchange losses (gains) | — | — | 
                                                39,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -304,442,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                33,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                -1,414,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,801,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                1,240,502,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,677,721,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -207,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,420,637,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                1,406,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,871,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                33,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -240,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -549,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -551,371,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                851,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,368,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                35,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -161,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -104,217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from operating activities | |||||||
| Loss (gain) on sale of non-current assets | — | — | 
                                                -23,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in accounts payable - other | — | — | 
                                                -271,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -12,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from operating activities | |||||||
| Loss (gain) on sale of investment securities | — | — | 
                                                -706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from facilities maintenance and investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -314,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -609,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                99,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                107,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of investment securities | — | — | 
                                                1,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                17,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,804,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Net cash provided by (used in) investing activities | — | — | 
                                                -955,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -835,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Proceeds from long-term borrowings | — | — | 
                                                2,128,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -134,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                141,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,505,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of long-term borrowings | — | — | 
                                                -2,607,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,779,522,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -5,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                189,920,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -857,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                152,746,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                113,803,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                3,438,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,191,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,683,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |