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 | 
                                                15,459,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                16,120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,072,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                7,057,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,415,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                35,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                -2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -23,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -925,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                554,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                425,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                421,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,205,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                354,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                18,371,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,339,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -5,766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -863,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,408,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                12,788,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,593,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,088,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -546,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -422,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from operating activities | |||||||
| Loss (gain) on sale of investment securities | — | — | 
                                                -8,107,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,455,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Loss (gain) on sale of non-current assets | — | — | 
                                                20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -27,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from operating activities | |||||||
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -7,293,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,915,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                64,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | — | 
                                                -17,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -32,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                2,320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,922,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of investment securities | — | — | 
                                                10,485,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,845,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Loan advances | — | — | 
                                                -160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -12,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -154,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -61,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from collection of loans receivable | — | — | 
                                                64,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                164,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from facilities maintenance and investing activities | |||||||
| Cash flows from financing activities | |||||||
| Purchase of treasury shares | — | — | 
                                                -13,931,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,001,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from long-term borrowings | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                244,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -2,609,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,959,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from issuance of bonds | — | — | 
                                                9,950,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -17,109,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of long-term borrowings | — | — | 
                                                -4,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,849,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                -2,134,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,893,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                -133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,822,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                24,225,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                26,359,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                22,466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |