Semi-Annual Statement Of Cash Flows
| Concept | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2021-04-01 to 2022-03-31 | As at 2022-03-31 | 2021-04-01 to 2022-03-31 | As at 2021-03-31 | 
|---|---|---|---|---|---|---|---|
| Semi-annual statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | — | 
                                                -50,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -108,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -14,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                42,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,654,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | — | 
                                                -3,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                16,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                -2,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                -73,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                229,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | — | 
                                                3,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -22,877,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -28,559,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                -87,283,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                221,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -60,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -21,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | — | 
                                                -10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -24,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                -104,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -149,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Net cash provided by (used in) financing activities | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                1,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,324,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                -190,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                76,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | 
                                                1,514,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,705,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,628,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |