Semi-Annual Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                1,091,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,892,217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                453,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                430,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                5,604,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,956,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                234,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                211,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                305,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                314,781,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investments and other assets | 
                                                552,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                668,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                195,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                115,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                230,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -3,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                1,092,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,195,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                6,697,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,151,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Accounts payable - trade | 
                                                273,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                58,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                208,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                409,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,362,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,796,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                779,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                990,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                50,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                1,412,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,847,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for bonuses | 
                                                35,556,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Share capital | 
                                                1,030,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,030,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | ||
| Capital surplus | 
                                                1,014,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,014,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                3,465,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,459,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -242,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -196,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                5,267,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,308,091,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                14,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                2,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -17,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                17,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                5,284,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,304,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                6,697,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,151,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |