Consolidated Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | 
                                                18,758,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,696,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                6,824,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,919,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Guarantee deposits | 
                                                4,532,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,651,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,292,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,268,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | ||
| Cash and deposits | 
                                                9,369,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,688,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                2,340,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,810,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                1,352,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                792,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                103,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                450,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                721,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -24,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                13,592,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,063,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                11,522,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,230,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                651,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                700,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | 
                                                11,161,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,013,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Leased assets | 
                                                7,893,872,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,259,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,832,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,589,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -12,017,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,333,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                412,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                547,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Assets | 
                                                32,351,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,760,440,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                947,702,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                288,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                1,229,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,228,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                251,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                5,067,168,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,336,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                4,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                10,793,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,851,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                2,316,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,235,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                5,836,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,557,266,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                46,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                8,965,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,608,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                765,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                761,971,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                19,758,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,460,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                12,354,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,165,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                2,398,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,396,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                9,932,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,747,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -77,113,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -78,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                239,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                134,592,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                89,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                238,974,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                135,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                12,593,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,300,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                32,351,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,760,440,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments |