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 | 
|---|---|---|---|---|---|
| Statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                -742,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -391,281,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -7,657,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -764,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -418,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from operating activities | |||||
| Cash flows from operating activities | |||||
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -88,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -119,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -90,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -122,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from facilities maintenance and investing activities | |||||
| Cash flows from financing activities | |||||
| Proceeds from issuance of shares | — | 
                                                341,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,056,727,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from issuance of bonds | — | 
                                                300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Redemption of bonds | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                268,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                985,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -371,309,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -68,978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                -10,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -597,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                474,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                350,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                947,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                473,171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |