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 | 
                                                20,264,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,379,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                4,442,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,092,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -145,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                107,081,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                108,120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                8,138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,516,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Intangible assets | 
                                                1,405,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,178,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                33,728,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,728,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                20,679,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,790,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,650,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,611,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -107,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                43,272,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,424,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                150,353,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                148,544,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit asset | 
                                                11,505,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,459,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                9,826,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                432,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,258,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,169,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                58,621,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,532,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                409,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                720,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                1,139,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,148,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                51,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                5,291,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,587,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                63,913,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,119,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                1,865,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                3,685,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses for directors (and other officers) | 
                                                18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Share capital | 
                                                4,479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | 
                                                4,837,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,837,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                71,389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,638,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -3,099,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,132,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                77,606,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,822,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                7,155,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                112,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                1,039,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,191,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                8,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,419,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                233,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                86,440,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,424,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                150,353,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                148,544,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |