Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                594,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                610,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                42,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                102,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                97,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                259,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                208,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -1,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                24,516,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                2,369,744,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,838,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Buildings | — | — | 
| Buildings, net | 
                                                633,806,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                650,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,680,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,680,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                2,601,991,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,590,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                71,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                216,585,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                188,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Own-used assets | ||
| Intangible assets | ||
| Intangible assets | 
                                                58,774,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                27,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                273,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                266,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                246,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                235,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                2,933,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,924,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | — | — | 
| Other assets | ||
| Assets | 
                                                5,303,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,762,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                973,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,270,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - trade | 
                                                208,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                291,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                11,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,409,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                168,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                296,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,441,195,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,959,763,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                79,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,651,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Non-current liabilities | ||
| Long-term borrowings | 
                                                580,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                472,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                755,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                654,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                1,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits | 
                                                168,030,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for retirement benefits for directors (and other officers) | 
                                                4,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                2,196,256,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,614,540,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                3,092,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,130,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                664,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                664,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                270,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                2,242,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,287,244,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -85,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -89,945,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                15,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                15,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,107,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,147,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                5,303,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,762,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings | ||
| Valuation and translation adjustments |