Quarterly 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 | 
|---|---|---|---|---|---|
| Quarterly consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                -505,941,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                614,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                38,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,774,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -5,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -70,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -52,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -538,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                659,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -175,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -88,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -293,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -489,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                233,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                533,116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from collection of loans receivable | — | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -199,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from long-term borrowings | — | 
                                                230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                310,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -328,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -426,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                -57,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -44,826,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -44,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid to non-controlling interests | — | 
                                                -842,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                330,639,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -61,171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                19,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,980,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -388,398,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                615,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                1,481,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,869,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,254,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |