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 | 
                                                4,649,392,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,887,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                110,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,530,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                91,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                8,759,155,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,653,155,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                2,390,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,402,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings | — | — | 
| Buildings, net | 
                                                172,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,590,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery and equipment | — | — | 
| Machinery and equipment, net | 
                                                176,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                178,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,677,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,677,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                363,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                370,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                72,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                75,277,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Investments and other assets | 
                                                2,598,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,342,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                1,029,668,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                991,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shares of subsidiaries and associates | 
                                                1,301,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,101,309,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                273,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                255,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -5,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                5,061,590,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,820,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred assets | 
                                                5,030,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred assets | ||
| Bond issuance costs | 
                                                5,030,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                13,825,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,480,011,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                979,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                999,052,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                28,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                148,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                127,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,237,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,387,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Bonds payable | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                297,579,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                165,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                859,218,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                726,967,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                3,096,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,114,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,204,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,204,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                819,054,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                819,054,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                8,184,413,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,066,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -45,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -45,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                10,163,156,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,045,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                566,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                320,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                566,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                320,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                10,729,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,365,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                13,825,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,480,011,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |