Consolidated Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                28,242,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,397,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Notes and accounts receivable - trade | 
                                                4,501,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                6,580,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,482,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                86,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                7,926,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,266,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,967,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,833,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -24,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                49,877,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,166,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                20,469,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,997,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                11,677,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,074,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investment securities | 
                                                7,769,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,301,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -28,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -28,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,936,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,801,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                8,633,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,738,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                158,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                183,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Assets | 
                                                70,346,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Non-current liabilities | 
                                                1,504,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,373,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                570,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                550,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                5,231,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,340,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                6,736,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                59,903,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,359,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                7,081,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,081,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                10,449,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,449,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                43,818,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,274,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,446,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,445,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                3,707,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,091,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                1,493,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                507,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                2,006,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,380,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                63,610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,450,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                70,346,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                722,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                442,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for product warranties | 
                                                42,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,246,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Other | 
                                                904,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                822,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments | ||
| Remeasurements of defined benefit plans | 
                                                204,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |