Quarterly Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Quarterly balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                6,310,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,352,014,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                1,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                1,106,228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                696,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                278,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                496,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -11,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -10,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                19,105,209,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,901,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                3,379,257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,375,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Land | 
                                                2,132,298,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,132,462,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,182,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,137,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -889,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -848,913,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                292,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                288,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                88,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Investments and other assets | 
                                                5,362,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,752,562,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                4,922,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,206,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                735,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                806,837,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -295,559,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -261,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                8,829,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,214,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                27,934,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,115,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                755,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                855,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                181,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                489,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                711,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                716,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                9,259,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,124,658,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Other | 
                                                141,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,598,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,546,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                10,857,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,671,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,029,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,029,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                832,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                826,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                15,864,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,272,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,212,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,218,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                16,513,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,909,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                512,668,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                482,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                563,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                534,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                17,077,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,443,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                27,934,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,115,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |