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 | 
                                                964,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                819,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | 
                                                47,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                42,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | 
                                                -134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | 
                                                -213,171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -173,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | 
                                                798,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                688,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -179,761,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -172,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | 
                                                -1,824,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,999,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | 
                                                64,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -707,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -473,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Dividends paid | 
                                                -95,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -95,054,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                -105,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -105,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -15,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                108,658,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                3,426,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,441,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,332,612,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |