Consolidated Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | 
                                                37,928,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,342,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                14,350,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,763,921,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investment securities | 
                                                12,787,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,980,424,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,577,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                796,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -14,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,074,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | ||
| Cash and deposits | 
                                                12,779,319,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,533,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                223,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Inventories | 
                                                11,935,574,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,329,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,900,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,342,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -56,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -65,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                33,442,774,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,899,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                21,348,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,879,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                3,854,479,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,512,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                7,423,785,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,941,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                10,070,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,424,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Other | — | — | 
| Intangible assets | ||
| Goodwill | 
                                                1,965,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,438,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                264,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                260,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other intangible assets | ||
| Intangible assets | 
                                                2,230,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,699,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Assets | 
                                                71,371,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,242,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                8,004,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,923,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Notes and accounts payable - trade | 
                                                562,925,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                419,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                1,032,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                603,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,784,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,009,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                22,362,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,011,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received | 
                                                9,977,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,055,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                18,440,047,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,480,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                243,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                357,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                72,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,043,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                18,756,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,871,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                41,118,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,883,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                27,516,378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,751,605,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                9,679,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,679,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                2,358,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,306,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                15,479,235,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,766,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                2,667,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                460,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                2,623,266,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,596,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                44,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,136,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                68,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                147,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                30,252,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,359,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                71,371,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,242,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments |