Consolidated Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | ||
| Property, plant and equipment | ||
| Buildings, net | 
                                                78,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                107,442,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                1,581,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other intangible assets | ||
| Intangible assets | 
                                                1,717,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                123,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                35,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                116,497,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -22,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                380,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Guarantee deposits | 
                                                224,509,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                2,205,327,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                230,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | ||
| Cash and deposits | 
                                                3,653,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,047,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                768,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                572,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - other | 
                                                16,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                108,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -5,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                4,542,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,662,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                6,747,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,892,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Deposits received | 
                                                73,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                199,911,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                70,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accrued expenses | 
                                                356,684,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                283,333,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                61,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                115,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                985,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                868,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Deferred tax liabilities | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                985,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                868,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                5,740,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,012,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                509,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                508,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                3,882,406,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                400,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                1,357,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,104,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -8,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -83,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                21,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                5,762,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,023,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                6,747,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,892,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity |