Hm, you got me there CGK. Not too sure? Maybe discounted Biz like UA?

Yes, the 345 has Premium Economy on the ultra long haul routes.
Nearly forgot, one of their AB6 SIN-BKK vv also sells U class. From what I've heard, Y+ on that plane is what they actually sell on the other 3 flights as J! Yes, the old J seats are being sold at Y+ I think its TG 414? I could be wrong with the flight number though.