Semi-Annual Consolidated 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 | 
|---|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | 
                                                43,019,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                57,872,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,477,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                16,660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                35,143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,464,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                4,541,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,286,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                3,849,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -3,399,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                1,040,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,115,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in retirement benefit liability | — | — | 
                                                -768,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -846,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Share of loss (profit) of entities accounted for using equity method | — | — | 
                                                1,958,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,840,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                749,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                202,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                -11,429,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,205,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                23,729,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,165,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -3,253,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -10,707,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                682,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,714,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                74,526,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,954,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                3,790,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,438,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -1,032,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,142,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -11,466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,076,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                65,817,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                89,173,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -43,036,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -47,342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                2,286,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,546,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                1,189,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,667,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                -1,683,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -55,095,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Proceeds from long-term borrowings | — | — | 
                                                879,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,800,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of long-term borrowings | — | — | 
                                                -9,623,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -33,296,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -8,225,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,221,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -37,299,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,808,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                -539,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -338,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                -1,669,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                25,166,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                147,464,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                122,298,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                82,893,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |