Consolidated Balance Sheet
| Concept | As at 2023-08-31 | As at 2023-05-31 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | 
                                                7,866,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,382,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                3,588,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,422,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investment securities | 
                                                1,044,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                870,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                360,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                351,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -2,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                374,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                379,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | ||
| Cash and deposits | 
                                                3,576,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,930,630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Notes and accounts receivable - trade | 
                                                2,054,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,132,275,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                3,084,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,992,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                1,184,562,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,263,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                571,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                577,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                1,459,550,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,442,855,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                151,568,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                125,762,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -1,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,652,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                12,890,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,251,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                4,201,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,880,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,246,761,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,243,073,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets, net | 
                                                183,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                194,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                345,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                467,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                91,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                1,738,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,303,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Machinery, equipment and vehicles | — | — | 
| Machinery, equipment and vehicles, net | 
                                                595,887,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                584,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | — | — | 
| Other | — | — | 
| Intangible assets | ||
| Other intangible assets | ||
| Other | 
                                                76,018,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                76,018,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Assets | 
                                                20,757,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,634,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                501,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                514,807,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                464,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                284,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                151,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                451,865,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                111,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,382,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                144,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,409,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                702,980,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                553,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,909,630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,042,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses for directors (and other officers) | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                279,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                342,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                50,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                735,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                736,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,169,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,259,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                104,133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                106,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                4,079,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,301,810,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                15,520,722,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,424,559,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                2,623,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,623,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                3,092,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,092,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                10,439,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,343,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -634,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -634,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,066,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                817,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                217,727,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                190,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                835,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                615,385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                91,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                90,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                16,678,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,332,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                20,757,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,634,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments | ||
| Remeasurements of defined benefit plans | 
                                                12,744,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |