Quarterly Statement Of Cash Flows
| Concept | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | As at 2022-03-31 | 
|---|---|---|---|---|---|
| Quarterly statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                -1,277,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,299,827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -1,279,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,303,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -1,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -5,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Proceeds from issuance of bonds | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Redemption of bonds | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -37,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                1,853,195,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                882,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                -1,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -3,392,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                572,721,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -424,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                1,417,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                844,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,268,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |