Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | 
                                                60,034,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,119,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                13,135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,694,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                5,452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,949,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Goodwill | 
                                                3,212,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,528,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,245,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,275,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                41,447,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,475,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investment securities | 
                                                26,521,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,879,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                741,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                846,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -708,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,805,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,875,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | — | — | 
| Current assets | ||
| Cash and deposits | 
                                                45,178,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,462,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Costs on construction contracts in progress | 
                                                2,704,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,274,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                1,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,092,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,023,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                178,464,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                203,374,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                18,290,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,209,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Intangible assets | ||
| Other intangible assets | ||
| Investments and other assets | ||
| Other assets | ||
| Assets | 
                                                238,499,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                266,494,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                3,106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,747,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                536,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                11,014,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,281,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received on construction contracts in progress | 
                                                16,918,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                73,944,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                103,504,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                2,764,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses for directors (and other officers) | 
                                                17,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                11,945,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,427,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                103,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                9,464,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,053,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                525,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                511,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                38,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                85,889,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,932,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                120,130,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,974,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                6,455,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,455,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                3,772,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,620,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                114,872,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,869,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -4,969,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,969,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                24,800,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,054,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                11,917,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,373,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                -16,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -57,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                152,609,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                151,562,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                238,499,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                266,494,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Valuation and translation adjustments | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings |