Balance Sheet
| Concept | As at 2024-03-31 | As at 2023-12-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                4,628,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,695,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                7,216,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,805,439,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                188,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                38,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Software | 
                                                307,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                389,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                296,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other intangible assets | ||
| Investments and other assets | ||
| Investments and other assets | 
                                                347,324,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                329,256,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                775,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                661,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | ||
| Assets | 
                                                7,991,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,466,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received | 
                                                1,762,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,504,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                234,605,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                178,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                20,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Contract liabilities | 
                                                168,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                157,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                113,735,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                121,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                6,092,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,105,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                11,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                6,092,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,106,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                1,751,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,256,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                2,078,007,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,823,717,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                2,316,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,062,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -2,643,452,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,629,324,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -70,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -70,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                115,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                16,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                1,899,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,360,149,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                7,991,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,466,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Valuation and translation adjustments | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings |