Consolidated Balance Sheet
| Concept | As at 2024-05-31 | As at 2024-02-29 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                48,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,427,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                48,815,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,376,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                23,769,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,563,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                207,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                199,046,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                200,763,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                191,517,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                78,479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,297,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investment securities | 
                                                20,123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,995,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Guarantee deposits | 
                                                31,783,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,373,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                20,977,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,026,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -22,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -27,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                112,094,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                107,863,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                33,944,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,014,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                78,150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                75,849,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Other | — | — | 
| Intangible assets | ||
| Intangible assets | 
                                                10,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,355,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Assets | 
                                                408,495,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                390,563,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                10,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                2,664,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,149,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                4,355,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,970,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                35,492,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,590,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                150,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                136,648,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                439,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                521,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                9,569,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,333,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,152,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                20,853,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,552,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                7,691,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,571,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                171,743,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                157,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                236,888,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                233,178,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                15,434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                24,632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                215,020,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                211,310,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -18,199,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,198,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                -137,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                183,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                -57,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                -6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                236,751,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                233,362,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                408,495,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                390,563,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments | ||
| Remeasurements of defined benefit plans | 
                                                -72,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |