Consolidated Balance Sheet
| Concept | As at 2023-09-30 | As at 2023-03-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                765,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                533,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Notes and accounts receivable - trade | 
                                                1,695,403,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,547,085,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                1,552,866,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,721,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                72,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,069,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                70,584,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,043,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Inventories | 
                                                1,696,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,853,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                65,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -2,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,901,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                5,150,967,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,401,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                2,943,585,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,872,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                353,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                329,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -7,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                2,577,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,529,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                2,100,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,100,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                89,531,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                277,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                236,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Machinery, equipment and vehicles | — | — | 
| Machinery, equipment and vehicles, net | 
                                                109,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Intangible assets | ||
| Intangible assets | 
                                                12,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Assets | 
                                                8,094,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,273,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Non-current liabilities | 
                                                1,862,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,982,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                1,103,685,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,240,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                109,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,526,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                3,970,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,222,641,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                2,790,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,983,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Notes and accounts payable - trade | 
                                                644,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                737,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                5,833,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,204,657,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                1,144,309,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                965,796,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                226,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                423,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                244,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -5,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,094,826,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,084,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                47,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Revaluation reserve for land | 
                                                1,036,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,036,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                11,001,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                22,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                2,261,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,068,761,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                8,094,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,273,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                89,074,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                171,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                183,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                93,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                181,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                123,346,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Other | 
                                                83,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities for land revaluation | 
                                                565,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                565,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments |