Quarterly Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Quarterly consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                91,920,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                546,780,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                13,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Inventories | 
                                                314,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                45,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                963,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,144,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                59,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Other | 
                                                120,654,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                131,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                416,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                369,539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                64,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Allowance for doubtful accounts | 
                                                -112,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -112,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                540,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                509,706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                1,503,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,653,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                85,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                155,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                832,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                660,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Bonds payable | 
                                                170,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                244,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                250,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                296,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                16,579,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,579,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                6,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                444,171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                564,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                1,276,599,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,224,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,230,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,205,123,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,220,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,195,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -2,225,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,970,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,452,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,452,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                224,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                429,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                2,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                227,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                429,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                1,503,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,653,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |