Semi-Annual Consolidated Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                13,942,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,557,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,765,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -99,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                82,198,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,904,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                22,329,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,988,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Intangible assets | 
                                                751,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                748,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                58,932,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,294,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                58,198,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,190,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                734,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,104,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                82,013,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                76,031,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                164,212,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                155,935,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                8,075,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,575,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,074,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                5,320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                20,979,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,717,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                903,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                947,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                2,609,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,598,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                12,610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,440,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                16,731,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,638,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                37,711,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,355,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                71,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                1,073,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,686,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                4,425,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,425,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                4,320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,313,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                84,243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -3,988,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,998,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                89,001,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,638,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                32,981,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,851,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                4,145,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,599,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                374,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                491,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                37,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,942,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                126,501,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,580,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                164,212,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                155,935,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |