Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                11,350,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,700,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                99,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Costs on construction contracts in progress | 
                                                315,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials | 
                                                304,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                269,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise | 
                                                15,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -71,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -59,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                29,875,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,587,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,280,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                795,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Land | 
                                                4,567,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,240,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                7,017,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,523,630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                148,285,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                115,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -4,193,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,904,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                442,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                445,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Intangible assets | ||
| Intangible assets | 
                                                2,121,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                276,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Goodwill | 
                                                1,851,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                270,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                276,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other intangible assets | ||
| Investments and other assets | ||
| Investment securities | 
                                                4,204,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,134,324,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                5,809,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,788,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term loans receivable | 
                                                9,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,908,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                341,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                532,603,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -209,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -207,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,384,841,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,253,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                14,948,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,588,824,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | — | — | 
| Other assets | ||
| Assets | 
                                                44,823,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,175,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                90,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                691,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received on construction contracts in progress | 
                                                3,992,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,339,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,374,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,358,870,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                17,953,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,742,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                180,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                389,437,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Non-current liabilities | ||
| Non-current liabilities | 
                                                142,285,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                177,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                142,285,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                177,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                18,095,754,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,919,706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                24,325,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,910,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                5,195,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,195,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                5,132,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,132,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                15,602,838,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,086,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,605,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,503,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                2,391,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,334,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                989,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                500,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                11,268,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,268,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                26,728,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,256,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                44,823,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,175,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings | ||
| Valuation and translation adjustments |