Yes, JKT48 are releasing "Koisuru Fortune Cookie" on the same day AKB48 are...
This was announced at the final show of their current tour, at the last Jakarta concert. Sasshi appeared in a VTR and announced it.
Only sources are livetweets from the concert and personal contact with someone who went...
Edit - the full title of the single is "Fortune Cookie in Love - Fortune Cookie Yang Mencinta"