v3.26.1
Cover - shares
6 Months Ended
Mar. 31, 2026
Apr. 29, 2026
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --09-30  
Entity File Number 001-43125  
Entity Registrant Name RF ACQUISITION CORP III  
Entity Central Index Key 0002091712  
Entity Tax Identification Number 00-0000000  
Entity Incorporation, State or Country Code E9  
Entity Address, Address Line One 111 Somerset  
Entity Address, Address Line Two #05-07  
Entity Address, City or Town Singapore  
Entity Address, Country SG  
Entity Address, Postal Zip Code 238164  
City Area Code 65  
Local Phone Number 6904 0766  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company true  
Entity Common Stock, Shares Outstanding   13,933,333
Units, each consisting of one ordinary share and one right to receive one-tenth of one ordinary share    
Title of 12(b) Security Units, each consisting of one ordinary share and one right to receive one-tenth of one ordinary share  
Trading Symbol RFAMU  
Security Exchange Name NASDAQ  
Ordinary Shares, par value $0.0001 per share    
Title of 12(b) Security Ordinary Shares, par value $0.0001 per share  
Trading Symbol RFAM  
Security Exchange Name NASDAQ  
Rights, each right entitling the holder thereof to one-tenth of one ordinary Share    
Title of 12(b) Security Rights, each right entitling the holder thereof to one-tenth of one ordinary Share  
Trading Symbol RFAMR  
Security Exchange Name NASDAQ