Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-09-30 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | 
                                                483,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                502,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                38,853,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                132,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                138,845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                11,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Goodwill | 
                                                120,793,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                125,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                312,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                324,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Guarantee deposits | 
                                                256,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                256,417,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                56,206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | ||
| Cash and deposits | 
                                                526,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                498,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                55,219,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Supplies | 
                                                7,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,406,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -901,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                928,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                873,622,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                52,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Intangible assets | ||
| Other intangible assets | ||
| Investments and other assets | ||
| Other assets | ||
| Assets | 
                                                1,412,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,376,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                16,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - trade | 
                                                65,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received | 
                                                17,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                67,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                4,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                148,735,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                161,009,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                411,994,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                466,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                11,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                322,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                257,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                316,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                251,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,816,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                3,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                734,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                723,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                677,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                652,722,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                84,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,721,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                285,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                285,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                377,277,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                352,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -70,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -70,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                677,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                652,722,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                1,412,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,376,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings |