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 | 
                                                9,475,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,634,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                917,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                2,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,612,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                1,027,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                943,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                2,043,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                305,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                229,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                24,041,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,346,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                20,625,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,436,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | 
                                                24,172,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,573,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures, net | 
                                                6,271,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,904,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -17,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -17,668,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles | 
                                                35,825,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,987,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles, net | 
                                                3,178,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,929,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -32,647,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -32,057,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                7,974,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,974,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | 
                                                993,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                949,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets, net | 
                                                701,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                707,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -292,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -242,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                2,064,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,524,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,386,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                435,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -2,951,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,940,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Other | 
                                                126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                15,171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,086,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                13,378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,303,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,457,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,490,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -80,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -82,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                35,922,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,664,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                59,964,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,010,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                346,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                395,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                386,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                219,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                6,914,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,914,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Retirement benefit liability | 
                                                108,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,769,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,997,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                2,595,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,814,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                9,510,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,729,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                5,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                25,650,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,647,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                20,036,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,413,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -6,214,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,225,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                44,471,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,835,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                3,353,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,979,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                695,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                555,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                4,187,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,695,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                1,795,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                50,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,281,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                59,964,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,010,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |