Semi-Annual Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                2,037,221,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,287,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                210,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                212,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -25,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -25,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                2,453,014,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,718,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Buildings | 
                                                3,382,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,285,452,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -2,279,952,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,290,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings, net | 
                                                1,102,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                994,987,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                1,772,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,671,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures | 
                                                344,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                334,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -287,639,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -288,576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures, net | 
                                                56,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,695,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                516,039,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                516,039,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | 
                                                279,987,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                279,987,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -200,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -172,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets, net | 
                                                79,784,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                107,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                18,302,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                5,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -5,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                7,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                7,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                92,652,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                1,875,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,858,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term loans receivable | 
                                                34,177,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,969,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                105,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                105,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                85,968,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                3,656,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,539,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                6,109,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,258,066,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Accounts payable - trade | 
                                                106,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                115,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                1,630,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,635,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                63,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                14,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                275,398,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                328,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,143,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,234,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                756,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                820,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                429,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                464,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                26,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                17,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                2,899,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,054,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for retirement benefits for directors (and other officers) | 
                                                124,374,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                115,697,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                46,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Share capital | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | ||
| Capital surplus | 
                                                1,735,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,735,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                1,451,052,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,443,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -111,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -111,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                3,175,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,167,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                -8,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                -8,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,210,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,203,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                6,109,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,258,066,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |