Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                101,108,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,495,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Costs on construction contracts in progress | 
                                                410,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                185,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                2,016,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,995,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                1,280,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,365,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                4,796,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -17,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                133,621,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                128,894,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,128,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                909,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                13,218,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,919,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                8,284,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,253,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                86,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                894,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                845,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Property, plant and equipment | ||
| Own-used assets | ||
| Intangible assets | ||
| Intangible assets | 
                                                850,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                779,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                7,619,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,616,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                31,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,449,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                72,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -151,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,353,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,356,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                45,522,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,148,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | — | — | 
| Other assets | ||
| Assets | 
                                                179,143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                169,043,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Non-current liabilities | 
                                                4,129,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,973,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                65,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,633,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                24,858,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,102,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                3,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                6,215,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,937,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                1,552,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,040,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,262,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                28,988,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,075,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                145,683,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                137,977,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                2,662,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,662,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                3,137,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,137,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                149,402,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                141,696,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -9,518,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,518,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                4,472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,989,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                150,155,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,967,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                179,143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                169,043,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Non-current liabilities | ||
| Provision for retirement benefits for directors (and other officers) | 
                                                1,277,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,253,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | ||
| Provision for bonuses | 
                                                1,351,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,526,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses for directors (and other officers) | 
                                                69,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Net assets | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings | ||
| Valuation and translation adjustments |