Key Financial Data Of Group
| Concept | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2022-04-01 to 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | As at 2022-03-31 | As at 2022-03-31 | As at 2021-03-31 | 2020-04-01 to 2021-03-31 | 2020-04-01 to 2021-03-31 | As at 2021-03-31 | 2019-04-01 to 2020-03-31 | As at 2020-03-31 | 2019-04-01 to 2020-03-31 | As at 2020-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key financial data of group | ||||||||||||||||||||||||||||||
| Business results of group | ||||||||||||||||||||||||||||||
| Net sales | — | — | — | — | 
                                                133,835,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                188,571,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                140,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                185,288,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,028,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                160,618,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                105,641,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                145,144,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                101,267,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                145,044,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | — | — | — | 
                                                8,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                16,082,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                13,120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                17,660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,281,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,790,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                9,122,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,762,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,289,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,356,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | — | — | — | — | — | — | 
                                                16,494,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                13,193,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                10,985,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                9,411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                6,672,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | — | — | — | — | — | — | 
                                                25,608,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                17,099,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,407,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                13,703,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                5,140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | — | — | — | — | — | — | 
                                                148,595,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                63,801,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                60,164,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,905,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                105,636,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,057,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                96,921,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                48,933,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                85,344,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                42,118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | — | — | — | — | — | — | 
                                                276,624,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                162,852,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                132,791,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                212,690,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                194,801,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,039,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,132,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                116,080,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                162,327,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                107,967,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets per share | — | — | — | — | — | — | — | 
                                                5,493.67
                                                
                                             | — | — | — | — | 
                                                2,613.03
                                                
                                             | — | — | 
                                                2,444.03
                                                
                                             | 
                                                4,637.52
                                                
                                             | — | — | — | 
                                                4,063.09
                                                
                                             | 
                                                2,155.54
                                                
                                             | 
                                                3,693.68
                                                
                                             | — | — | 
                                                1,976.17
                                                
                                             | — | 
                                                3,236.50
                                                
                                             | — | 
                                                1,699.36
                                                
                                             | 
| Basic earnings (loss) per share | — | — | — | — | 
                                                291.48
                                                
                                             | — | 
                                                673.20
                                                
                                             | — | — | — | — | — | — | — | 
                                                426.02
                                                
                                             | — | — | 
                                                537.67
                                                
                                             | 
                                                361.31
                                                
                                             | 
                                                445.29
                                                
                                             | — | — | — | 
                                                271.52
                                                
                                             | 
                                                381.28
                                                
                                             | — | 
                                                167.12
                                                
                                             | — | 
                                                269.06
                                                
                                             | — | 
| Diluted earnings per share | — | — | — | — |  | — |  | — | — | — | — | — | — | — |  | — | — |  |  |  | — | — | — |  |  | — |  | — |  | — | 
| Equity-to-asset ratio | — | — | — | — | — | — | — | 
                                                0.485
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                0.392
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.453
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.535
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                0.512
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.428
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.521
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.422
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.493
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.390
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Rate of return on equity | — | — | — | — | 
                                                0.116
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.133
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                0.185
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.124
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.175
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.115
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                0.148
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.110
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.100
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.085
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Price-earnings ratio | — | — | — | — | 
                                                31.9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                13.8
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                10.4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                8.2
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                11.7
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                9.5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                17.9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                12.8
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                17.4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                10.8
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | — | — | — | — | — | 
                                                -8,993,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                -7,233,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,950,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                13,937,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                17,057,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | — | — | — | — | — | 
                                                -10,564,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                -4,717,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -3,299,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -3,899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -4,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | — | — | — | — | — | 
                                                25,954,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                1,895,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -5,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -5,576,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -10,702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | — | — | — | — | — | — | 
                                                22,077,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                14,853,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                24,409,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,071,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                14,830,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Number of employees | 
                                                149
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                607
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                2,428
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                141
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                12
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                4,669
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                534
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,473
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                304
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,231
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                252
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                1,086
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                3,732
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                3,783
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,038
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                3,814
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                1,033
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                3,876
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                1,027
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |