Semi-Annual Consolidated Statement Of Cash Flows
| Concept | 2024-03-21 to 2024-09-20 | As at 2024-09-20 | As at 2024-03-20 | 2023-03-21 to 2023-09-20 | As at 2023-09-20 | As at 2023-03-20 | 
|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Subtotal | 
                                                185,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                366,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | 
                                                92,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                64,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -3,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -51,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -72,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                222,874,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                359,806,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | 
                                                -451,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -96,178,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | 
                                                5,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -465,658,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -91,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | ||||||
| Repayments of long-term borrowings | 
                                                -125,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -55,042,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | 
                                                -217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | 
                                                -29,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -29,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -161,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -85,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                17,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                12,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -386,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                195,374,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                1,191,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,577,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,013,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                818,374,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |