Key Financial Data Of Group
| Concept | 2024-02-21 to 2025-02-20 | As at 2025-02-20 | 2023-02-21 to 2024-02-20 | As at 2024-02-20 | As at 2023-02-20 | 2022-02-21 to 2023-02-20 | As at 2022-02-20 | 2021-02-21 to 2022-02-20 | 2020-02-21 to 2021-02-20 | As at 2021-02-20 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Key financial data of group | ||||||||||
| Business results of group | ||||||||||
| Net sales | 
                                                185,974,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                177,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                169,524,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                163,016,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                159,418,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                12,651,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,588,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                11,588,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,852,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,374,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                91,269,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                84,984,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,098,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                72,301,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                67,643,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | 
                                                148,947,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                140,463,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                129,592,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                122,411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                117,443,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets per share | — | 
                                                1,513.29
                                                
                                             | — | 
                                                1,411.12
                                                
                                             | 
                                                1,279.87
                                                
                                             | — | 
                                                1,187.34
                                                
                                             | — | — | 
                                                1,087.26
                                                
                                             | 
| Basic earnings (loss) per share | 
                                                136.48
                                                
                                             | — | 
                                                136.66
                                                
                                             | — | — | 
                                                126.51
                                                
                                             | — | 
                                                138.98
                                                
                                             | 
                                                133.22
                                                
                                             | — | 
| Diluted earnings per share | 
                                                135.49
                                                
                                             | — | 
                                                136.31
                                                
                                             | — | — | 
                                                126.35
                                                
                                             | — | 
                                                138.79
                                                
                                             | 
                                                133.22
                                                
                                             | — | 
| Equity-to-asset ratio | — | 
                                                0.610
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.603
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.594
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.590
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.575
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Rate of return on equity | 
                                                0.093
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.101
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.102
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.122
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.129
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Price-earnings ratio | 
                                                16.1
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                15.3
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                12.4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                10.0
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                11.5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | 
                                                9,133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,542,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,467,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,073,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -1,827,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,504,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,410,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,353,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,551,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                -2,436,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,184,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,969,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,280,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,056,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                67,472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                62,624,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,748,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                59,687,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                56,556,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Number of employees | — | 
                                                695
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                680
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                680
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                725
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                713
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Average number of temporary employees | — | 
                                                4,229
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                4,155
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                3,969
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                3,922
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                3,951
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |