Semi-Annual Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                4,444,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,473,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                248,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                351,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -16,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                14,793,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                17,028,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Tools, furniture and fixtures | — | — | 
| Tools, furniture and fixtures, net | 
                                                245,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                284,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                13,895,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,910,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                175,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                186,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                2,477,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,109,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                2,681,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                21,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                19,885,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,663,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                34,679,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,857,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                2,857,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,725,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                73,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                814,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                709,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                10,866,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,951,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                9,528,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,519,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                3,515,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,488,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                878,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                893,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                20,395,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,471,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for retirement benefits for directors (and other officers) | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                109,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                235,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                52,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities for land revaluation | 
                                                3,828,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,828,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                2,255,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,255,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | ||
| Capital surplus | 
                                                585,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                585,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                1,313,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,716,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                4,150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,552,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                129,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                9,208,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Revaluation reserve for land | 
                                                8,690,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,691,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                14,283,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,386,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                34,679,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,857,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |