The Ibanez EX series is a series of electric guitars produced by Hoshino Gakki, first introduced in 1988. The EX (short for Experimental) models were RG-like guitars produced in Korea instead of Japan as a more affordable alternative. The guitars featured the RG shape, but with rounded edges, as opposed to the squared edges of the RG line. They presumably were named differently to prevent them from possibly hurting the reputation of the RG name, although some markets already did have some Korean made RG models.
They were equipped with Powersound pickups in various configurations, and most had an Ibanez TRS-101 tremolo, licensed by Floyd Rose.