Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | 
                                                14,529,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                1,247,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,248,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | ||
| Cash and deposits | 
                                                1,174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                972,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Notes receivable - trade | 
                                                57,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                164,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                5,332,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,355,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                4,877,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,528,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                67,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                2,699,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,754,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,142,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                15,349,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,167,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                13,240,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,310,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                4,545,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,480,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                2,107,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,012,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | 
                                                9,774,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures, net | 
                                                3,521,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,572,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -6,254,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,128,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Machinery, equipment and vehicles | 
                                                24,068,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,835,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles, net | 
                                                3,067,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,246,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -21,001,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,589,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                4,491,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -2,384,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,296,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                42,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Investments and other assets | ||
| Assets | 
                                                29,878,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,720,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                285,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                212,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                620,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                620,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                470,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                463,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,015,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,562,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                8,085,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,278,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                1,180,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,490,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                2,550,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,519,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                4,047,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                317,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                221,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                12,132,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,509,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                17,503,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,994,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                1,572,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,572,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,009,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,009,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                14,962,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -40,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -40,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                242,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                217,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                49,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                146,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                17,746,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,211,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                29,878,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,720,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments | ||
| Remeasurements of defined benefit plans | 
                                                47,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |