Statement Of Cash Flows
| Concept | As at 2024-09-30 | 2024-04-01 to 2024-09-30 | As at 2024-03-31 | As at 2023-09-30 | 2023-04-01 to 2023-09-30 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|
| Statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | — | 
                                                31,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                90,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                67,876,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                68,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                -652,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividend income | — | 
                                                -17,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -18,781,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | 
                                                2,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Loss (gain) on sale of investment securities | — | 
                                                -52,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -20,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | 
                                                38,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -10,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | 
                                                -365,330,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                84,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | 
                                                -161,541,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                325,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                17,722,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                18,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -2,074,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -55,195,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -31,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from operating activities | ||||||
| Impairment losses | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                23,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in provision for bonuses | — | 
                                                -5,907,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -6,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | 
                                                295,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                138,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -106,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                45,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -201,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                310,789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from operating activities | ||||||
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | — | 
                                                -95,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -52,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                80,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                45,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -142,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                30,719,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | — | 
                                                -213,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -259,945,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of investment securities | — | 
                                                169,706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                321,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from collection of loans receivable | — | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from facilities maintenance and investing activities | ||||||
| Cash flows from financing activities | ||||||
| Purchase of treasury shares | — | 
                                                -122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -22,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | 
                                                -44,826,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -44,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from long-term borrowings | — | 
                                                230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                280,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -180,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -255,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                5,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                161,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                20,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -317,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                506,392,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                1,552,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,869,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,760,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,254,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |