Key Financial Data Of Group
| Concept | As at 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | 2023-07-01 to 2024-06-30 | As at 2024-06-30 | 2023-07-01 to 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | 2022-07-01 to 2023-06-30 | As at 2023-06-30 | As at 2023-06-30 | 2022-07-01 to 2023-06-30 | 2021-07-01 to 2022-06-30 | 2021-07-01 to 2022-06-30 | As at 2022-06-30 | As at 2022-06-30 | As at 2021-06-30 | 2020-07-01 to 2021-06-30 | 2020-07-01 to 2021-06-30 | As at 2021-06-30 | 2019-07-01 to 2020-06-30 | As at 2020-06-30 | 2019-07-01 to 2020-06-30 | As at 2020-06-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key financial data of group | |||||||||||||||||||||||||
| Business results of group | |||||||||||||||||||||||||
| Net sales | — | — | — | 
                                                22,134,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                22,052,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                20,353,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                17,816,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                16,034,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Operating revenue | — | — | — | — | — | 
                                                1,223,539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,103,930,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                703,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                637,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                627,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | — | — | 
                                                4,368,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                630,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                515,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,091,865,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                89,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,753,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                3,404,824,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,367,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                141,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | — | — | — | 
                                                2,946,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                2,687,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,359,319,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,136,871,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,745,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Comprehensive income | — | — | — | 
                                                2,970,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                2,693,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,358,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,124,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,744,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net assets | — | 
                                                25,051,674,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                12,089,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,313,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,923,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                18,665,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,256,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,703,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,557,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                10,818,149,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,915,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | 
                                                32,004,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                13,221,568,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                11,411,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,464,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                26,249,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,946,499,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,804,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                12,138,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,085,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                22,902,476,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets per share | — | 
                                                594.79
                                                
                                             | — | — | — | — | — | 
                                                287.02
                                                
                                             | — | — | 
                                                260.32
                                                
                                             | 
                                                528.12
                                                
                                             | — | — | — | 
                                                471.14
                                                
                                             | 
                                                258.89
                                                
                                             | 
                                                421.61
                                                
                                             | — | — | 
                                                266.48
                                                
                                             | — | 
                                                273.06
                                                
                                             | — | 
                                                376.48
                                                
                                             | 
| Basic earnings (loss) per share | — | — | — | 
                                                74.14
                                                
                                             | — | 
                                                15.55
                                                
                                             | — | — | — | 
                                                12.44
                                                
                                             | — | — | 
                                                67.83
                                                
                                             | 
                                                2.41
                                                
                                             | 
                                                59.55
                                                
                                             | — | — | — | 
                                                53.94
                                                
                                             | 
                                                1.93
                                                
                                             | — | 
                                                44.05
                                                
                                             | — | 
                                                4.04
                                                
                                             | — | 
| Diluted earnings per share | — | — | — |  | — |  | — | — | — |  | — | — |  |  |  | — | — | — |  |  | — |  | — |  | — | 
| Equity-to-asset ratio | — | 
                                                0.7828
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | 
                                                0.9143
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.9038
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.7351
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                0.7111
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.8586
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.6734
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.8697
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.8951
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.6513
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Rate of return on equity | — | — | — | 
                                                0.1282
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.0552
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                0.0479
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.1358
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0092
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.1334
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                0.1352
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0071
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.1232
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.0147
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Price-earnings ratio | — | — | — | 
                                                9.46
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                45.08
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                55.47
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                10.17
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                297.93
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                12.06
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                12.66
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                353.89
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                10.89
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                118.84
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | — | — | 
                                                3,830,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                2,736,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,094,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                3,051,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,277,788,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | — | 
                                                -1,471,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                -304,113,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -477,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -223,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -546,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | — | 
                                                795,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                -812,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -804,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -678,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -556,793,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                13,195,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                10,035,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                8,421,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,590,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                5,430,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Number of employees | 
                                                194
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                289
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                270
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                19
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                19
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                19
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                76
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                21
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                297
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                303
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                22
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                303
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                22
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                20
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                296
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Average number of temporary employees | 
                                                64
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                77
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                73
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                3
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                56
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                44
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                40
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                3
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                24
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |