Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-07-31 | As at 2024-01-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                6,449,047,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,759,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                209,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                662,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                12,818,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,285,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                13,865,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,630,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | 
                                                13,538,873,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,002,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures, net | 
                                                8,937,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,524,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -4,600,918,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,477,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles | 
                                                7,719,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,977,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles, net | 
                                                2,008,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,488,303,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -5,710,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,489,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,526,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,526,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                368,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                290,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                6,375,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,064,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                1,023,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                800,007,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -5,352,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,264,816,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                41,668,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,903,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                582,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                567,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                444,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                410,870,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                21,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                116,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,333,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                14,489,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,246,009,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                27,308,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,531,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                458,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                334,437,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                285,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,540,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,733,711,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                4,519,243,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,183,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Retirement benefit liability | 
                                                242,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                241,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                286,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                287,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                545,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                554,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                5,065,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,737,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                237,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                280,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                17,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses for directors (and other officers) | 
                                                13,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,111,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,111,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,303,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,303,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                21,371,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,948,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,710,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,718,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                22,075,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,644,545,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                74,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                21,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,816,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                70,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                167,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                149,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                22,242,856,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,793,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                27,308,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,531,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |