v3.25.2
Cover - shares
3 Months Ended
Dec. 31, 2024
Jun. 30, 2025
Cover [Abstract]    
Entity Registrant Name ARCULUS SYSTEM CO., LTD.  
Entity Central Index Key 0001828739  
Document Type 10-Q  
Amendment Flag false  
Current Fiscal Year End Date --09-30  
Entity Small Business true  
Entity Shell Company false  
Entity Emerging Growth Company true  
Entity Current Reporting Status Yes  
Document Period End Date Dec. 31, 2024  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2025  
Entity Ex Transition Period false  
Entity Common Stock Shares Outstanding   4,058,167
Entity File Number 333-252535  
Entity Incorporation State Country Code NV  
Entity Tax Identification Number 98-1511882  
Entity Address Address Line 1 4695 MacArthur Court  
Entity Address Address Line 2 11th Floor  
Entity Address City Or Town Newport Beach  
Entity Address State Or Province CA  
Entity Address Postal Zip Code 92660  
City Area Code 949  
Local Phone Number 289-6789  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes