Semi-Annual Balance Sheet
| Concept | As at 2023-09-30 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                29,923,966,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,169,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,003,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,387,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -3,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                42,259,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,490,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                2,876,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,009,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                41,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                1,481,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,347,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,440,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,294,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investments and other assets | 
                                                4,242,244,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,847,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,244,803,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,029,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -142,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -315,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                8,600,526,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,203,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                50,859,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,694,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Accounts payable - trade | 
                                                250,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                344,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                539,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                461,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,023,641,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,663,861,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                25,714,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,647,378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                7,954,257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,649,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                10,109,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,331,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                8,692,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,938,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                366,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                363,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                485,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                471,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                35,824,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,978,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for retirement benefits for directors (and other officers) | 
                                                565,244,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                558,577,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                976,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                884,437,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Share capital | 
                                                1,299,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,299,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | ||
| Capital surplus | 
                                                734,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                734,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                13,053,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,744,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -66,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -66,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                15,021,512,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,712,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                3,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                14,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                15,035,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,716,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                50,859,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,694,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |