Balance Sheet
| Concept | As at 2024-06-30 | As at 2023-12-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                1,972,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,275,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Supplies | 
                                                1,516,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,793,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise | 
                                                763,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                686,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -285,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                33,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                3,314,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,323,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Buildings | — | — | 
| Buildings, net | 
                                                1,349,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,377,367,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                1,623,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,653,302,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                216,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Structures | — | — | 
| Structures, net | 
                                                29,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,697,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery and equipment | — | — | 
| Machinery and equipment, net | 
                                                18,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,980,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Own-used assets | ||
| Tools, furniture and fixtures | — | — | 
| Tools, furniture and fixtures, net | 
                                                9,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                23,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                22,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Other intangible assets | ||
| Investments and other assets | ||
| Investments and other assets | 
                                                55,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                1,702,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,746,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | ||
| Assets | 
                                                5,017,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,069,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Non-current liabilities | ||
| Non-current liabilities | 
                                                358,322,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                358,322,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,484,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,017,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                90,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                101,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                395,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | ||
| Current portion of long-term borrowings | 
                                                100,008,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Contract liabilities | 
                                                28,047,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,541,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                31,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Liabilities | 
                                                1,842,713,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,017,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                3,174,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,052,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                363,631,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                358,007,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                367,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                362,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                2,443,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,332,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,174,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,052,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                5,017,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,069,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings |