Semi-Annual Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                3,773,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,336,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                96,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,947,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -6,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                8,522,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,977,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                2,694,330,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,718,945,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery and equipment | 
                                                826,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                805,877,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -652,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -623,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery and equipment, net | 
                                                174,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,806,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures | 
                                                664,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                650,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -529,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -505,079,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures, net | 
                                                135,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                145,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,344,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,344,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | 
                                                75,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                75,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -64,014,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -61,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets, net | 
                                                11,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                475,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                26,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                18,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | 
                                                1,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                7,205,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,512,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                9,693,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,033,574,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                151,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                137,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                28,699,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -11,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                12,414,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,784,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                20,936,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,762,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Lease liabilities | 
                                                6,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                115,113,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                131,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                85,374,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received | 
                                                6,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,499,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,508,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                217,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                219,842,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                1,058,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,074,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                7,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,177,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                3,558,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,583,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for retirement benefits for directors (and other officers) | 
                                                112,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                128,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                58,257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,290,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,290,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | ||
| Capital surplus | 
                                                1,210,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,210,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                14,125,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,925,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -180,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -180,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                16,446,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,246,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                517,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                525,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                517,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                525,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                17,378,325,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,179,348,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                20,936,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,762,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |