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 | 
                                                12,869,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,475,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                2,141,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,475,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                19,053,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                8,070,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,668,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,609,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,952,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -46,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -46,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                66,507,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,687,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                35,414,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,607,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | 
                                                33,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,099,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -22,992,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -22,667,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures, net | 
                                                10,316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,432,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles | 
                                                23,067,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,765,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -20,537,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,353,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles, net | 
                                                2,530,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,412,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                20,490,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,490,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                1,206,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Other | 
                                                1,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,943,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                1,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,943,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                5,194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                1,265,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,372,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term loans receivable | 
                                                106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                1,182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,298,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                862,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                868,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                42,510,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,940,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                109,017,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                116,627,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                12,975,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,451,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                2,160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,740,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,323,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,735,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,599,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                24,850,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,884,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                2,300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,800,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                12,017,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,285,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                751,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                20,053,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,903,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                44,904,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,788,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                8,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                7,408,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,408,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                42,447,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,920,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -445,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -454,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                57,409,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,874,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                352,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                14,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                519,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                451,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                501,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,338,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,375,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                5,365,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,588,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                64,113,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,839,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                109,017,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                116,627,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |