Semi-Annual Consolidated 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 | 
|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                144,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                160,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                9,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -290,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -16,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -21,921,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                127,526,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                138,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -11,899,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -12,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -31,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -58,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -87,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Repayments of long-term borrowings | — | 
                                                -27,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -30,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from issuance of shares | — | 
                                                17,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -10,235,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -19,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                58,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                31,669,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                937,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                879,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                847,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |