Rainbow recently made their Japanese debut with "A" and has just topped one of the largest Japanese download sites 'Recochoku', on their weekly download rankings with the short version of their music video. Having released the ringtone version prior to the full song itself, "A" received a lot of attention and most views for its short version music video all proving the high anticipation for Rainbow's debut. Rainbow first entered Japan just three days ago to begin promotions for the song that will officially be released on September 14th. Japanese fans prepared a giant LED display of the group in the busy streets of Shibuya to welcome Rainbow and support their debut. With the help of such fans as well as their own heavy promotions, Rainbow currently ranks first with AKB48 following in second. Source & Photo: Chosun via Naver