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 | 
                                                2,262,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,253,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,513,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                40,747,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                13,010,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,493,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                1,551,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                40,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                697,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                2,279,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                -775,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                7,777,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                -18,069,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -782,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -8,975,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                14,450,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -4,460,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                93,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                970,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                10,016,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,392,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                1,694,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,483,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -2,276,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from operating activities | |||||||
| Loss (gain) on sale of investment securities | — | — | 
                                                -311,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                223,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from operating activities | |||||||
| Increase (decrease) in accounts payable - other | — | — | 
                                                -3,312,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,852,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -18,568,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                384,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | — | 
                                                -42,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -58,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                -20,642,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -16,014,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Loan advances | — | — | 
                                                -237,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -237,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from collection of loans receivable | — | — | 
                                                242,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                202,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -34,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from facilities maintenance and investing activities | |||||||
| Cash flows from financing activities | |||||||
| Purchase of treasury shares | — | — | 
                                                -3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,028,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -11,048,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,828,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from long-term borrowings | — | — | 
                                                20,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of long-term borrowings | — | — | 
                                                -106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -10,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                7,468,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,278,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -47,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -32,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                820,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                458,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                -2,336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                558,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                20,581,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                22,917,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                22,359,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |