Key Financial Data Of Reporting Company
| Concept | As at 2024-08-31 | As at 2024-08-31 | As at 2024-08-31 | 2023-09-01 to 2024-08-31 | As at 2024-08-31 | As at 2024-08-31 | As at 2023-08-31 | 2022-09-01 to 2023-08-31 | As at 2022-08-31 | 2021-09-01 to 2022-08-31 | 2020-09-01 to 2021-08-31 | As at 2021-08-31 | 2019-09-01 to 2020-08-31 | As at 2020-08-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||||||||||
| Business results of reporting company | ||||||||||||||
| Net sales | — | — | — | 
                                                8,825,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                6,637,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,332,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,407,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,411,043,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | — | — | 
                                                783,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                470,907,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                729,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                990,313,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,041,351,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) | — | — | — | 
                                                559,327,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                313,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                491,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                669,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                657,054,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Equity in earnings (losses) of affiliates if equity method is applied | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Share capital | — | — | — | — | — | 
                                                1,408,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,408,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,408,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,408,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,408,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total number of issued shares | — | — | — | — | — | 
                                                2,200,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,200,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | 
                                                2,200,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | — | 
                                                2,200,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | 
                                                2,200,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Net assets | — | — | — | — | — | 
                                                6,810,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,344,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,024,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,696,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,119,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | — | — | — | — | 
                                                10,310,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,549,744,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,489,099,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,771,762,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,795,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets per share | — | — | — | — | — | 
                                                3,366.77
                                                
                                             | 
                                                3,115.69
                                                
                                             | — | 
                                                3,034.61
                                                
                                             | — | — | 
                                                2,869.11
                                                
                                             | — | 
                                                2,577.71
                                                
                                             | 
| Dividend paid per share | — | — | — | 
                                                75.00
                                                
                                             | — | — | — | 
                                                55.00
                                                
                                             | — | 
                                                55.00
                                                
                                             | 
                                                65.00
                                                
                                             | — | 
                                                55.00
                                                
                                             | — | 
| Interim dividend paid per share | — | — | — | 
                                                0.00
                                                
                                             | — | — | — | 
                                                0.00
                                                
                                             | — | 
                                                0.00
                                                
                                             | 
                                                0.00
                                                
                                             | — | 
                                                0.00
                                                
                                             | — | 
| Basic earnings (loss) per share | — | — | — | 
                                                275.74
                                                
                                             | — | — | — | 
                                                155.82
                                                
                                             | — | 
                                                247.41
                                                
                                             | 
                                                336.93
                                                
                                             | — | 
                                                327.88
                                                
                                             | — | 
| Diluted earnings per share | — | — | — |  | — | — | — |  | — |  |  | — |  | — | 
| Equity-to-asset ratio | — | — | — | — | — | 
                                                0.661
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.664
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.635
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.649
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.582
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Rate of return on equity | — | — | — | 
                                                0.085
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                0.051
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.084
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.124
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.137
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Price-earnings ratio | — | — | — | 
                                                6.2
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                8.8
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                5.4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                4.5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                4.6
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Payout ratio | — | — | — | 
                                                0.272
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                0.353
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.222
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.193
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.168
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | — | — | 
                                                1,556,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -23,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                372,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                301,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                744,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | — | — | 
                                                -270,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -338,812,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                290,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -306,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                36,861,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | — | — | 
                                                -396,930,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -195,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                48,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -396,713,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -125,699,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | — | — | — | — | 
                                                5,029,891,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,140,243,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,697,539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,984,974,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,386,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Number of employees | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                112
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                24
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                136
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                138
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                135
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                126
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                119
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Average number of temporary employees | — | 
                                                11
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                16
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                17
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                18
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                20
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                20
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Total shareholder return | — | — | — | — | — | 
                                                1.511
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1.199
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                1.125
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                1.236
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                1.159
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Total return on share price index | — | — | — | — | — | 
                                                2.024
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1.701
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                1.394
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                1.359
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                1.098
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |