Quarterly Consolidated Statement Of Cash Flows
| Concept | As at 2023-10-31 | 2023-05-01 to 2023-10-31 | As at 2023-04-30 | 2022-05-01 to 2022-10-31 | As at 2022-10-31 | As at 2022-04-30 | 
|---|---|---|---|---|---|---|
| Quarterly consolidated statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | — | 
                                                835,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                452,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | — | 
                                                94,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                69,116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Amortization of goodwill | — | 
                                                2,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,669,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                -103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -11,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividend income | — | 
                                                -20,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in trade receivables | — | 
                                                181,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                131,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in inventories | — | 
                                                -152,579,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in trade payables | — | 
                                                -42,941,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -29,412,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -79,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                41,541,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | — | 
                                                1,028,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                567,652,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                20,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -134,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -87,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                893,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                480,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | — | 
                                                -169,502,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -40,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -10,001,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -19,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                6,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -201,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -155,698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | ||||||
| Proceeds from issuance of shares | — | 
                                                7,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -448,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                7,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -448,309,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                700,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -123,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                4,658,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,957,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,606,317,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,511,282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |