v3.26.1
Cover - shares
3 Months Ended
Jun. 30, 2026
Aug. 12, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --03-31  
Entity File Number 001-43445  
Entity Registrant Name ADVASA HOLDINGS, INC.  
Entity Central Index Key 0002084227  
Entity Tax Identification Number 39-3819559  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 1-2-7 Moto-Akasaka  
Entity Address, Address Line Two Minato-ku  
Entity Address, City or Town Tokyo  
Entity Address, Country JP  
Entity Address, Postal Zip Code 107-0051  
City Area Code +81  
Local Phone Number 3-6868-5538  
Title of 12(b) Security Common Stock, 0.00001 par value per share  
Trading Symbol ADBT  
Security Exchange Name NASDAQ  
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 false  
Entity Common Stock, Shares Outstanding   487,065,702