Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-03-31 | As at 2023-06-30 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                1,562,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,630,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                195,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                108,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -15,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                6,946,398,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,868,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                4,082,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,012,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Land | 
                                                2,308,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,302,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | — | — | 
| Leased assets, net | 
                                                16,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                241,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                167,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                191,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                214,889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                44,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                235,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                269,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                776,283,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                872,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Other | 
                                                305,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                358,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                5,094,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,153,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                12,040,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,021,979,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit asset | 
                                                471,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                513,980,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                1,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                3,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                324,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                223,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                370,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                571,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                4,347,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,856,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                159,970,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                15,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                57,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                40,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                273,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                302,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                4,620,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,159,271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                399,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,046,116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                925,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                6,145,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,667,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -242,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -180,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                7,349,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,812,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                34,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,994,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                36,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                70,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                7,420,334,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,862,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                12,040,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,021,979,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |