v3.26.1
Cover - shares
6 Months Ended
Mar. 31, 2026
May 01, 2026
Cover [Abstract]    
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 333-191725  
Entity Registrant Name REGEN BIOPHARMA, INC.  
Entity Central Index Key 0001589150  
Entity Tax Identification Number 45-5192997  
Entity Incorporation, State or Country Code NV  
Entity Address, Address Line One 8697 La Mesa Blvd  
Entity Address, Address Line Two Suite C  
Entity Address, Address Line Three #107  
Entity Address, City or Town La Mesa  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 91942  
City Area Code 619  
Local Phone Number 722-5505  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   511,957,643
Entity Information, Former Legal or Registered Name None