Quarterly Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Quarterly balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                3,180,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,759,855,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                19,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                1,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                123,774,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                7,113,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,241,293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                627,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                633,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Land | 
                                                371,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                371,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                255,876,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                262,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                371,440,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                429,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Investments and other assets | 
                                                2,202,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,897,008,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                1,765,068,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,419,658,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                437,330,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                477,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                3,200,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,959,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                10,314,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,201,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                347,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                303,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                235,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                362,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,940,871,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,299,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Other | 
                                                11,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                609,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                611,099,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                2,550,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,910,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                575,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                575,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                440,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                437,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                6,090,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,717,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -213,967,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -41,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                6,892,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,688,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                696,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                458,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                696,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                458,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                174,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,442,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                7,764,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,290,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                10,314,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,201,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |