Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-02-29 | As at 2023-05-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                954,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                852,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                99,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                3,832,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,581,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                954,791,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                911,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Land | 
                                                260,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                260,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                136,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                69,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,837,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                394,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                384,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                221,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,947,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                87,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                85,155,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                101,133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                1,418,452,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,366,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                5,250,574,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,948,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                4,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                292,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                303,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,813,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,055,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                1,246,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                872,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                26,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                4,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,341,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                977,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                3,154,968,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,033,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                148,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                191,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                143,172,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,172,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                671,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                665,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                1,253,309,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,137,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -37,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -49,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deposits for subscriptions of treasury shares | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                223,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                2,030,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,896,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                65,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                65,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                2,095,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,915,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                5,250,574,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,948,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |