Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                63,394,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,698,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                21,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,510,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                202,587,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                208,243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                127,122,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,536,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                87,449,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,020,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                39,673,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,515,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                1,498,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,556,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                7,362,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,587,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                8,860,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                81,421,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,284,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                34,939,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,808,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                18,616,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,746,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -98,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                217,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                211,964,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                419,991,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                420,208,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                7,030,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,547,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                31,034,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,424,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                116,489,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                155,466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                30,916,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                2,256,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,158,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                6,763,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,644,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,529,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,533,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                42,742,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,651,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                159,231,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                167,118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                276,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                315,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses for directors (and other officers) | 
                                                63,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Share capital | 
                                                3,931,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,931,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | 
                                                7,533,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                254,877,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                247,272,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -3,868,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,894,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                262,473,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                254,806,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Revaluation reserve for land | 
                                                -1,805,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,805,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                -42,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                -1,713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,716,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                260,760,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                253,090,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                419,991,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                420,208,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |