v3.25.4
Cover - USD ($)
12 Months Ended
Dec. 31, 2025
Feb. 11, 2026
Jun. 30, 2025
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-42106    
Entity Registrant Name RF ACQUISITION CORP II    
Entity Central Index Key 0002012807    
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 Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
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 Public Float     $ 123,719,276
Entity Common Stock, Shares Outstanding   8,343,765  
Document Financial Statement Error Correction [Flag] false    
Auditor Name MaloneBailey, LLP    
Auditor Location Houston, Texas    
Auditor Firm ID 206    
Units, each consisting of one ordinary share and one right      
Title of 12(b) Security Units, each consisting of one ordinary share and one right    
Trading Symbol RFAIU    
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 RFAI    
Security Exchange Name NASDAQ    
Rights, each right entitling the holder thereof to one-twentieth of one ordinary share      
Title of 12(b) Security Rights, each right entitling the holder thereof to one-twentieth of one ordinary share    
Trading Symbol RFAIR    
Security Exchange Name NASDAQ