Key Financial Data Of Group
| Concept | 2023-06-01 to 2024-05-31 | As at 2024-05-31 | As at 2024-05-31 | As at 2024-05-31 | As at 2024-05-31 | 2023-06-01 to 2024-05-31 | As at 2024-05-31 | As at 2024-05-31 | As at 2024-05-31 | As at 2024-05-31 | As at 2023-05-31 | As at 2023-05-31 | 2022-06-01 to 2023-05-31 | 2022-06-01 to 2023-05-31 | 2021-06-01 to 2022-05-31 | 2021-06-01 to 2022-05-31 | As at 2022-05-31 | As at 2022-05-31 | 2020-06-01 to 2021-05-31 | As at 2021-05-31 | 2020-06-01 to 2021-05-31 | As at 2021-05-31 | 2019-06-01 to 2020-05-31 | As at 2020-05-31 | As at 2020-05-31 | 2019-06-01 to 2020-05-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key financial data of group | ||||||||||||||||||||||||||
| Business results of group | ||||||||||||||||||||||||||
| Net sales | 
                                                11,213,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                9,287,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                11,367,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,454,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,354,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,829,968,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,765,878,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,703,475,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,493,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,377,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | 
                                                1,349,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,241,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,690,228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,433,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,614,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,401,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,152,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,050,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                840,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                784,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | 
                                                687,223,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
                                                1,493,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,170,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                822,651,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                595,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Comprehensive income | 
                                                1,116,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
                                                1,651,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,387,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,137,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                503,994,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net assets | — | 
                                                14,044,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                17,142,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,332,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,679,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                14,966,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,703,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                13,862,967,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,053,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,405,827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,009,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | 
                                                17,493,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                20,945,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,634,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,777,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                18,509,853,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,989,099,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,235,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                15,267,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,351,930,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,152,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets per share | — | 
                                                1,983.01
                                                
                                             | — | — | — | — | — | — | — | 
                                                2,407.11
                                                
                                             | 
                                                2,293.40
                                                
                                             | 
                                                1,931.52
                                                
                                             | — | — | — | — | 
                                                2,101.38
                                                
                                             | 
                                                1,793.67
                                                
                                             | — | 
                                                1,947.95
                                                
                                             | — | 
                                                1,701.95
                                                
                                             | — | 
                                                1,610.47
                                                
                                             | 
                                                1,828.98
                                                
                                             | — | 
| Basic earnings (loss) per share | 
                                                97.03
                                                
                                             | — | — | — | — | 
                                                88.04
                                                
                                             | — | — | — | — | — | — | 
                                                210.85
                                                
                                             | 
                                                186.54
                                                
                                             | 
                                                165.23
                                                
                                             | 
                                                145.77
                                                
                                             | — | — | 
                                                116.15
                                                
                                             | — | 
                                                105.89
                                                
                                             | — | 
                                                84.10
                                                
                                             | — | — | 
                                                79.38
                                                
                                             | 
| Diluted earnings per share |  | — | — | — | — |  | — | — | — | — | — | — |  |  |  |  | — | — |  | — |  | — |  | — | — |  | 
| Equity-to-asset ratio | — | 
                                                0.803
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                0.814
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.787
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.769
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                0.804
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.794
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.800
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.790
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.795
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.802
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Rate of return on equity | 
                                                0.0413
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                0.0450
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                0.0960
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.1002
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0816
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0834
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.0615
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.0639
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.0464
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.0499
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Price-earnings ratio | 
                                                15.97
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                17.61
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                7.23
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                8.17
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                9.04
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                10.24
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                14.68
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                16.10
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                13.91
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                14.74
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | 
                                                1,410,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
                                                982,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                942,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,577,290,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,144,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -1,458,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
                                                182,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -708,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -1,486,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -297,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -618,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
                                                -112,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -532,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -370,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                142,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | — | — | — | — | — | — | — | — | 
                                                3,904,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,330,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                3,135,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,247,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,449,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Number of employees | — | 
                                                371
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                19
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                19
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                59
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                59
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                293
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                448
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                526
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                520
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                367
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                512
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                360
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                507
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                366
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                357
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                491
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |