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 | 
                                                16,449,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,167,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                864,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                47,160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,854,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                6,988,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,370,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Intangible assets | 
                                                581,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                675,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                11,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,111,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                10,237,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,846,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,265,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,274,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                19,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,157,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                66,227,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,012,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                2,230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                582,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,558,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,387,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,361,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                25,412,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,677,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Retirement benefit liability | 
                                                1,036,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                608,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                456,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,645,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                27,057,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,255,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                3,857,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,857,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                3,824,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,798,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                28,655,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,321,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -647,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                35,689,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                3,621,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,662,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                293,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                233,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                -434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -455,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                3,480,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,440,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                39,170,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,756,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                66,227,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,012,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |