Balance Sheet
| Concept | As at 2024-03-31 | As at 2023-12-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | 
                                                14,915,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,958,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cash and deposits | 
                                                4,329,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,022,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                295,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                299,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -19,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | ||
| Investments in leases | 
                                                687,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                701,576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Costs on construction contracts in progress | 
                                                80,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                1,233,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,160,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                606,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                633,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                2,788,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,711,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                15,986,780,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,961,147,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                6,190,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,190,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                3,478,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,385,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                1,415,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,457,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Property, plant and equipment | ||
| Own-used assets | ||
| Intangible assets | ||
| Goodwill | 
                                                161,475,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                558,223,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                583,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                396,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                407,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other intangible assets | ||
| Investments and other assets | 
                                                998,941,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                948,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -3,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,002,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                950,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Non-current assets | 
                                                17,543,945,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,492,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | — | — | 
| Other assets | ||
| Assets | 
                                                32,459,871,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,451,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - trade | 
                                                1,326,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,378,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                647,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                599,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                176,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                198,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,032,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,675,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                3,706,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,155,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | 
                                                223,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Non-current liabilities | ||
| Long-term borrowings | 
                                                5,038,787,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,699,325,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                6,190,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,855,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | 
                                                15,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                830,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                841,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                22,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Liabilities | 
                                                9,896,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,010,574,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                21,023,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,228,509,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                1,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                498,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                498,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                20,451,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,656,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -926,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -926,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,539,410,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,211,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                118,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                22,562,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,440,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                32,459,871,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,451,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings | ||
| Valuation and translation adjustments |