Semi-Annual Consolidated Balance Sheet
| Concept | As at 2023-09-30 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                3,648,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,047,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                86,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -5,104,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                4,517,849,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,662,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                117,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Goodwill | 
                                                1,622,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                1,765,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                361,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                35,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                144,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,837,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -22,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                2,244,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                230,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                6,762,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,892,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                146,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                28,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,049,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                868,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                1,049,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                868,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                120,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                115,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                509,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                508,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                3,882,156,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                400,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                1,312,321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,104,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -6,814,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -83,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                5,696,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,012,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                15,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                5,712,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,023,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                6,762,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,892,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |