Semi-Annual Statement Of Cash Flows
| Concept | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | As at 2022-03-31 | 
|---|---|---|---|---|---|
| Semi-annual statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | 
                                                1,206,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                762,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | 
                                                2,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | 
                                                -3,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -4,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | 
                                                1,175,327,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                710,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -844,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -401,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of property, plant and equipment | 
                                                531,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | 
                                                -5,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -754,721,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -422,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Repayments of long-term borrowings | 
                                                -271,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -249,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -638,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | 
                                                -528,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -139,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                -806,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,034,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                3,685,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -381,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -742,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                3,848,921,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,230,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,972,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |