Semi-Annual Consolidated Statement Of Cash Flows
| Concept | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                589,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                805,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                14,920,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -14,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                334,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                578,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -99,490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -251,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                16,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -314,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -534,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                303,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of shares of subsidiaries resulting in change in scope of consolidation | — | 
                                                -601,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,815,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Loan advances | — | 
                                                -1,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from collection of loans receivable | — | 
                                                978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                1,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -592,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -117,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Repayments of long-term borrowings | — | 
                                                -238,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -235,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -84,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -69,927,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -381,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -349,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                2,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -636,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                162,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                4,124,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,761,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,599,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |