Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                14,017,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,886,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                499,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                21,346,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,795,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                14,780,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,622,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                25,356,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,983,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                6,591,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,153,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -32,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -42,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                119,611,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,240,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                30,299,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,950,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                5,018,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,088,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                21,365,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                379,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                465,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,917,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,809,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit asset | 
                                                307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -33,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -33,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                23,936,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,348,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                59,254,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,386,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                178,865,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                177,627,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Non-current liabilities | ||
| Long-term borrowings | 
                                                14,335,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                435,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                176,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                181,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                227,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                671,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                15,445,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | ||
| Short-term borrowings | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Notes and accounts payable - trade | 
                                                13,838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,265,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                923,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                10,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                2,190,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,198,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                6,331,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,803,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                33,393,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,491,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                48,838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,892,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                124,224,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,829,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                4,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                136,121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                136,726,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -17,349,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -17,350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                5,802,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,905,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                5,690,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,926,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                130,027,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                130,735,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                178,865,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                177,627,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments | ||
| Remeasurements of defined benefit plans | 
                                                112,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |