v3.25.2
Cover
Jul. 16, 2025
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 16, 2025
Entity File Number 001-42674
Entity Registrant Name Jena Acquisition Corporation II
Entity Central Index Key 0002060337
Entity Tax Identification Number 98-1842831
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 1701 Village Center Circle
Entity Address, City or Town Las Vegas
Entity Address, State or Province NV
Entity Address, Postal Zip Code 89134
City Area Code (702)
Local Phone Number 323-7330
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one Class A ordinary share and one right  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one right
Trading Symbol JENA.U
Security Exchange Name NYSE
Class A ordinary shares, par value $0.0001 per share  
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share
Trading Symbol JENA
Security Exchange Name NYSE
Rights, each right entitling the holder to receive one-twentieth (1/20) of one Class A ordinary share   
Title of 12(b) Security Rights, each right entitling the holder to receive one-twentieth (1/20) of one Class A ordinary share 
Trading Symbol JENA.R
Security Exchange Name NYSE