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 | 
                                                533,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                643,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                740,845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                578,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                325,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                322,283,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                252,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                671,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                -233,788,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -28,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -8,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                65,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                11,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,922,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                204,842,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -286,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                -33,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                757,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,837,042,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -748,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                797,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                71,076,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -280,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -47,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -48,537,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                769,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,784,371,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                8,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -63,256,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -61,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from operating activities | |||||||
| Loss (gain) on sale of non-current assets | — | — | 
                                                100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from operating activities | |||||||
| Increase (decrease) in accounts payable - other | — | — | 
                                                -297,685,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                399,651,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Net cash provided by (used in) investing activities | — | — | 
                                                -688,348,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -332,406,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -20,257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from facilities maintenance and investing activities | |||||||
| Cash flows from financing activities | |||||||
| Purchase of treasury shares | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -96,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from long-term borrowings | — | — | 
                                                1,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -192,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -43,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of long-term borrowings | — | — | 
                                                -201,384,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -15,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -1,305,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,037,957,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                -1,224,258,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                414,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                6,628,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,852,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,438,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |