Semi-Annual Consolidated Statement Of Cash Flows
| Concept | As at 2024-12-31 | 2024-07-01 to 2024-12-31 | As at 2024-06-30 | As at 2023-12-31 | 2023-07-01 to 2023-12-31 | As at 2023-06-30 | 
|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Subtotal | — | 
                                                142,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                261,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                10,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -3,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                22,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                271,540,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | — | 
                                                -18,545,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -9,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | — | 
                                                -29,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -74,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                903,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -52,781,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -116,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | ||||||
| Redemption of bonds | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -133,401,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -77,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -20,612,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | 
                                                -67,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -57,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -208,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -174,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -11,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -8,860,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                1,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -31,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -238,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -18,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                3,375,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,613,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,817,651,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,836,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |