With KARA and SNSD at the forefront of girl group advancements in Japan, there's a second wave of girl groups heading over, and they're none other than T-ara, Rainbow, and SECRET! All three groups are currently scheduled for back-to-back debuts in August and September.  T-ara previously held their debut showcase at the AX HALL and managed to bring in 2,000 fans and over 300 different Japanese media outlets like Fuji TV, Nihon TV, NHK, and Yomiuri News. T-ara is scheduled for a debut in September with "Bo Peep Bo Peep". SECRET followed the day after at the Laforet Museum with the same number of fans and journalists from media outlets. SECRET will be debuting a month ahead of T-ara on August 3rd with "Madonna". Rainbow, who recently wrapped up their Korean promotions, will be debuting in September with their hit track, "A". The girls are currently in the midst of shooting for their album jacket cover and music video. Already known for being labelmates to KARA, Rainbow's debut is one of the most anticipated yet. Pop culture critic Kang Tae Gyu said, "The Japanese market has become the foundation of the Hallyu wave. It's a country of sensation, and a lot of Korean girl groups are advancing with speed to join the Hallyu wave as their next phase of development." Source + Photos: E News 24 via Nate