v3.26.1
Cash and cash equivalents (Tables)
 12 Months Ended
Dec. 31, 2025
Notes and other explanatory information [abstract]  
Schedule of cash and cash equivalents
                   
        December 31,
2025		     December 31,
2024		  
        (In thousands of Korean won)  
Cash on hand   ₩     15,121       2,355  
Deposits in banks         8,349,311       4,148,217  
Total   ₩     8,364,432       4,150,572