Semi-Annual Statement Of Cash Flows
| Concept | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | 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 | — | 
                                                814,406,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                415,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                324,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                331,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividend income | — | 
                                                -33,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -39,531,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | 
                                                3,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Foreign exchange losses (gains) | — | 
                                                -48,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in provision for bonuses | — | 
                                                1,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | 
                                                -423,427,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                57,946,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | 
                                                -339,197,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -115,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | 
                                                178,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                198,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | 
                                                281,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                775,104,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                37,147,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                46,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                286,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                665,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -225,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -31,639,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -297,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of investment securities | — | 
                                                803,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                1,059,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | — | 
                                                -335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -111,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | 
                                                -207,293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -210,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -207,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -322,009,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                18,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                35,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                1,156,317,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                566,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                5,584,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,428,113,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,861,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |