Semi-Annual Consolidated Statement Of Cash Flows
| Concept | As at 2023-09-30 | 2022-10-01 to 2023-09-30 | 2021-10-01 to 2022-09-30 | As at 2022-09-30 | As at 2021-09-30 | 
|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                2,119,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,748,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                11,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -48,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -36,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -353,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -112,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                1,732,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,044,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -22,333,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -12,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of shares of subsidiaries resulting in change in scope of consolidation | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,210,991,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Loan advances | — | 
                                                -400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of shares of subsidiaries resulting in change in scope of consolidation | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from collection of loans receivable | — | 
                                                400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                6,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -230,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,422,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from short-term borrowings | — | 
                                                2,635,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,070,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of short-term borrowings | — | 
                                                -3,396,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,035,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                660,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -7,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -287,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from issuance of shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,050,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -655,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,112,427,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of shares of subsidiaries not resulting in change in scope of consolidation | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -8,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                846,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -354,885,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                2,586,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,739,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,085,918,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |