Consolidated Statement Of Cash Flows
| Concept | As at 2024-03-31 | 2023-10-01 to 2024-03-31 | As at 2023-09-30 | 2022-10-01 to 2023-09-30 | As at 2022-09-30 | 
|---|---|---|---|---|---|
| Consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                607,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                284,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -69,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -89,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                538,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                195,199,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -14,199,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -69,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -18,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -65,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -592,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||
| Net cash provided by (used in) financing activities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                519,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                129,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                1,768,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,249,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,119,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |