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 | 
                                                67,252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,872,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                19,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,787,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                207,675,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                205,907,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                114,030,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,248,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Other | — | — | 
| Other, net | 
                                                35,605,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,906,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                9,208,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,104,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                1,584,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,671,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                7,623,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,433,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                45,686,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Other | 
                                                18,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,662,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -85,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -75,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                168,924,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                154,764,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                376,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                360,672,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                4,651,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,249,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                30,583,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,872,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                118,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                113,249,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Asset retirement obligations | 
                                                6,415,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,156,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,532,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,641,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                11,373,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,095,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                129,880,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,344,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                3,931,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,931,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                7,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                240,928,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                230,658,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -3,894,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,940,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                248,462,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                238,080,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                109,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Revaluation reserve for land | 
                                                -1,805,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,805,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                -1,742,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,781,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                246,720,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                236,328,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                376,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                360,672,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |