Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-09-20 | As at 2024-03-20 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                1,191,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,577,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                188,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                220,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                2,366,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,613,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                2,475,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,177,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                674,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                705,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery, equipment and vehicles | — | — | 
| Machinery, equipment and vehicles, net | 
                                                228,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                254,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,071,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,071,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | 
                                                369,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                4,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                173,392,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                788,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                880,642,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                383,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                350,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                171,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                256,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                22,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,545,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -18,293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                3,436,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,146,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                5,803,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,760,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                250,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                1,908,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                29,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                97,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,339,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,499,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                489,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                614,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                5,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                12,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                763,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                876,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                2,102,499,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,375,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                88,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,518,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,518,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,093,537,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,093,537,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                1,367,814,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,111,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -394,371,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -437,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                3,585,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,286,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                43,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                71,675,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                115,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                4,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,700,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,384,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                5,803,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,760,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |