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 | 
|---|---|---|---|---|---|
| Statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                -422,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,381,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                8,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -1,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -29,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -38,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -453,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,421,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from operating activities | |||||
| Cash flows from operating activities | |||||
| Cash flows from facilities maintenance and investing activities | |||||
| Purchase of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Net cash provided by (used in) investing activities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -28,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from long-term borrowings | — | 
                                                1,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                970,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -375,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                1,617,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,356,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                1,164,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -93,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                2,231,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,067,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,160,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |