Quarterly Consolidated Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Quarterly consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                19,149,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,394,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                19,619,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,074,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                14,791,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,079,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                19,385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,872,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,349,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -39,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -41,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                120,501,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,030,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                28,777,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,834,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Intangible assets | 
                                                5,119,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,393,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                24,542,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,785,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                21,302,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,979,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                1,439,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,830,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,519,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                58,440,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,014,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                178,942,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                176,045,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                14,155,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,762,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                10,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                272,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,027,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                11,742,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,710,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                47,588,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,983,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                485,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,636,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                3,550,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,721,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                740,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                776,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                4,777,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                52,365,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,584,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                4,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                135,287,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                134,396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -17,350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -17,666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                123,390,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                5,262,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,695,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                386,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                340,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                -2,462,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,756,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                3,186,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,278,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                126,576,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                125,461,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                178,942,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                176,045,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |