Quarterly 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 | 
|---|---|---|---|---|---|
| Quarterly statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Profit (loss) before income taxes | — | 
                                                136,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                230,409,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                195,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                170,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividend income | — | 
                                                -576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | 
                                                25,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                20,837,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | 
                                                272,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -9,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | 
                                                -241,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,526,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | 
                                                167,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -30,899,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                14,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -8,079,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | 
                                                863,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                722,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -24,490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -21,129,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -4,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -49,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                375,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                244,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -400,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -270,422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -3,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,911,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -405,215,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -268,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Proceeds from long-term borrowings | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -194,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -111,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Redemption of bonds | — | 
                                                -22,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -22,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | — | 
                                                -73,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -239,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                242,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -268,385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                218,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                1,068,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,337,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,118,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |